diff --git a/lib/world/mob/49.mob b/lib/world/mob/491.mob
similarity index 96%
rename from lib/world/mob/49.mob
rename to lib/world/mob/491.mob
index 7a2985c..28f5762 100644
--- a/lib/world/mob/49.mob
+++ b/lib/world/mob/491.mob
@@ -1,4 +1,4 @@
-#4900
+#49100
 waiter~
 the waiter~
 A waiter who knows all his customers is serving drinks here.
@@ -10,7 +10,7 @@ A waiter who knows all his customers is serving drinks here.
 230 52900
 8 8 1
 E
-#4901
+#49101
 shopkeeper~
 the shopkeeper~
 A friendly man reading a zine is sitting behind the counter.
diff --git a/lib/world/mob/492.mob b/lib/world/mob/492.mob
new file mode 100644
index 0000000..4e832b2
--- /dev/null
+++ b/lib/world/mob/492.mob
@@ -0,0 +1,66 @@
+#49200
+book worm~
+the book worm~
+A creepy little book work is crawling through the books.
+~
+   Yuck!  I bet they eat books!
+~
+72 0 0 0 0 0 0 0 -250 E
+1 20 9 0d0+10 1d2+0
+10 100
+8 8 0
+E
+#49201
+apprentice~
+Master Ultan's apprentice~
+One of Master Ultan's apprentices stands here looking confused.
+~
+   He is clinging to a book he has never read.  He looks harmless, but
+you never can tell.
+~
+76 0 0 0 0 0 0 0 0 E
+2 20 8 0d0+20 1d2+0
+20 400
+8 8 1
+E
+#49202
+journeyman guard~
+Master Ultan's journeyman~
+One of Master Ultan's journeymen stands guard here.
+~
+   The Journeyman is responsible for protecting the books from being read.
+What a strange guild they are!
+~
+10 0 0 0 0 0 0 0 0 E
+3 19 8 0d0+30 1d2+0
+30 900
+8 8 1
+E
+#49203
+book thief~
+the book thief~
+An imp-like thing is sneaking thorugh the shelves, stealing books.
+~
+   A tiny, vaguely humanoid shaped creature.  Before you ever get a
+good look at it, it darts back into the shelves.
+~
+236 0 0 0 0 0 0 0 -800 E
+3 19 8 0d0+30 1d2+0
+30 900
+8 8 1
+E
+#49204
+master ultan~
+Master Ultan~
+Master Ultan stands here, touching books with his creepy finger.
+~
+   He is the head of the Librarians Guild, which hoards books.  He is
+an old man, haggard and nearly blind.  He looks like a harmless old
+man, but he has survived thus far.
+~
+10 0 0 0 0 0 0 0 0 E
+5 19 7 1d1+50 1d2+0
+50 2500
+8 8 1
+E
+$
diff --git a/lib/world/mob/index b/lib/world/mob/index
index 47097e7..e92a987 100644
--- a/lib/world/mob/index
+++ b/lib/world/mob/index
@@ -38,7 +38,6 @@
 44.mob
 45.mob
 46.mob
-49.mob
 50.mob
 51.mob
 52.mob
@@ -183,6 +182,8 @@
 343.mob
 345.mob
 346.mob
+491.mob
+492.mob
 555.mob
 556.mob
 653.mob
diff --git a/lib/world/obj/49.obj b/lib/world/obj/49.obj
index 454b77d..eafa0f6 100644
--- a/lib/world/obj/49.obj
+++ b/lib/world/obj/49.obj
@@ -61,17 +61,13 @@ focuses on High Level Adventures, and - look! - there is a report from
 the ongoing Arden Vul campaign in there too!
 ~
 #4906
-sink water~
-a sink~
-A sink with a tap.~
+dagger~
+a dagger~
+A dagger is lying here.~
 ~
-23 cde 0 0 0 0 0 0 0 0 0 0 0
-500 500 0 0
-505 0 0 0 0
-E
-sink tap~
-   It is an ordinary sink with a tap.  You might fill your canteen
-here.
-~
-
+5 ag 0 0 0 ano 0 0 0 0 0 0 0
+0 1 4 11
+1 1 0 0
+A
+19 1
 $
\ No newline at end of file
diff --git a/lib/world/obj/491.obj b/lib/world/obj/491.obj
index d7665b3..d2acb47 100644
--- a/lib/world/obj/491.obj
+++ b/lib/world/obj/491.obj
@@ -1,3 +1,16 @@
+#49103
+sink water~
+a sink~
+A sink with a tap.~
+~
+23 cde 0 0 0 0 0 0 0 0 0 0 0
+500 500 0 0
+505 0 0 0 0
+E
+sink tap~
+   It is an ordinary sink with a tap.  You might fill your canteen
+here.
+~
 #49104
 key~
 a small key~
diff --git a/lib/world/shp/491.shp b/lib/world/shp/491.shp
index c1e4d90..3e3f0ca 100644
--- a/lib/world/shp/491.shp
+++ b/lib/world/shp/491.shp
@@ -17,7 +17,7 @@ CircleMUD v3.0 Shop File~
 %s I'll give you %d coins for that.~
 0
 2
-4900
+49100
 0
 49100
 -1
@@ -40,7 +40,7 @@ CircleMUD v3.0 Shop File~
 %s I'll give you %d coins for that.~
 0
 2
-4901
+49101
 0
 49102
 -1
diff --git a/lib/world/wld/491.wld b/lib/world/wld/491.wld
index c095b7e..2a803a3 100644
--- a/lib/world/wld/491.wld
+++ b/lib/world/wld/491.wld
@@ -139,9 +139,16 @@ You see the Balcony above the Entry Hall.
 S
 #49112
 The Library~
-   Not much to see here (for now).
+   The walls are bookshelves and the room is filled with plenty of
+winged chairs, reading desks and map tables.  One book shelves to the
+North seems to be a door of some sort?
 ~
 491 de 0 0 0 0
+D0
+A curious door.  Where might it lead?
+~
+~
+1 -1 49200
 D2
 You see the Balcony above the Entry.
 ~
diff --git a/lib/world/wld/492.wld b/lib/world/wld/492.wld
new file mode 100644
index 0000000..70f524b
--- /dev/null
+++ b/lib/world/wld/492.wld
@@ -0,0 +1,286 @@
+#49200
+The Entrance to the Library Maze~
+   This seems to be some secret section of the library.  There is
+shelves full of books everywhere!  Let's hope you don't get lost here.
+~
+492 d 0 0 0 0
+D0
+The shelves continue North.
+~
+~
+0 -1 49202
+D3
+The shelves continue West.
+~
+~
+0 -1 49201
+D2
+Through the door you see the Library of the Grenzland Build.
+~
+~
+1 -1 49112
+S
+#49201
+A dead end in the Library Maze~
+   This is a dead end.  There is shelves full of books everywhere!
+Let's hope you don't get lost here.
+~
+492 d 0 0 0 0
+D1
+The shelves continue East.
+~
+~
+0 -1 49200
+S
+#49202
+A corridor in the Library Maze~
+   This is a corridor.  It continues North and South.  There is
+shelves full of books everywhere!  Let's hope you don't get lost here.
+~
+492 d 0 0 0 0
+D0
+The shelves continue North.
+~
+~
+0 -1 49203
+D2
+The shelves continue South.
+~
+~
+0 -1 49200
+S
+#49203
+A junktion in the Library Maze~
+   This is a junktion.  Corridors continue East, South, and West.  A
+door leads North.  There is shelves full of books everywhere!  Let's
+hope you don't get lost here.
+~
+492 d 0 0 0 0
+D0
+A door leads north
+~
+~
+1 -1 49210
+D1
+The shelves continue East.
+~
+~
+0 -1 49207
+D2
+The shelves continue South.
+~
+~
+0 -1 49202
+D3
+The shelves continue West.
+~
+~
+0 -1 49204
+S
+#49204
+A corridor in the Library Maze~
+   This is a corridor.  It continues East and West.  There is shelves
+full of books everywhere!  Let's hope you don't get lost here.
+~
+492 d 0 0 0 0
+D1
+The shelves continue East.
+~
+~
+0 -1 49203
+D3
+The shelves continue West.
+~
+~
+0 -1 49205
+S
+#49205
+A corridor in the Library Maze~
+   This is a corridor.  It continues East.  A door leads south.  There
+is shelves full of books everywhere!  Let's hope you don't get lost
+here.
+~
+492 d 0 0 0 0
+D1
+The shelves continue East.
+~
+~
+0 -1 49204
+D2
+A door leads South.
+~
+~
+1 -1 49206
+S
+#49206
+A Reading Room~
+   This seems to be a reading room.  There are a few desks here.  The
+room has only one exit North.
+~
+492 d 0 0 0 0
+D0
+A door leads North.
+~
+~
+1 -1 49205
+S
+#49207
+A corridor in the Library Maze~
+   This is a corridor.  It continues East and West.  There is shelves
+full of books everywhere!  Let's hope you don't get lost here.
+~
+492 d 0 0 0 0
+D1
+The shelves continue East.
+~
+~
+0 -1 49208
+D3
+The shelves continue West.
+~
+~
+0 -1 49203
+S
+#49208
+A junktion in the Library Maze~
+   This is a junktion.  Corridors continue South and West.  A door
+leads North.  There is shelves full of books everywhere!  Let's hope
+you don't get lost here.
+~
+492 d 0 0 0 0
+D0
+A door leads north
+~
+~
+1 -1 49211
+D2
+The shelves continue South.
+~
+~
+0 -1 49209
+D3
+The shelves continue West.
+~
+~
+0 -1 49207
+S
+#49209
+A dead end in the Library Maze~
+   This is a dead end.  There is shelves full of books everywhere!
+Let's hope you don't get lost here.
+~
+492 d 0 0 0 0
+D0
+The shelves continue North.
+~
+~
+0 -1 49208
+S
+#49210
+A dark corridor in the Library Maze~
+   This is a corridor.  There are no light sources!  The corridor
+continues North.  A door leads South.  There is shelves full of books
+everywhere!  Let's hope you don't get lost here.
+~
+492 ad 0 0 0 0
+D0
+The shelves continue North.
+~
+~
+0 -1 49214
+D2
+A door leads South.
+~
+~
+1 -1 49203
+S
+#49211
+A dark corridor in the Library Maze~
+   This is a corridor.  There are no light sources!  The corridor
+continues North.  A door leads South.  There is shelves full of books
+everywhere!  Let's hope you don't get lost here.
+~
+492 ad 0 0 0 0
+D0
+The shelves continue North.
+~
+~
+0 -1 49212
+D2
+A door leads South.
+~
+~
+1 -1 49208
+S
+#49212
+A dark corridor in the Library Maze~
+   This is a corridor.  There are no light sources!  The corridor
+continues South and West.  There is shelves full of books everywhere!
+Let's hope you don't get lost here.
+~
+492 ad 0 0 0 0
+D2
+The shelves continue South.
+~
+~
+0 -1 49211
+D3
+The shelves continue West.
+~
+~
+1 -1 49213
+S
+#49213
+A dark junktion in the Library Maze~
+   This is a junktion.  There are no light sources!  Corridors
+continue East and West.  A door leads North.  There is shelves full
+of books everywhere!  Let's hope you don't get lost here.
+~
+492 ad 0 0 0 0
+D0
+A door leads north
+~
+~
+1 -1 49215
+D1
+The shelves continue East.
+~
+~
+0 -1 49212
+D3
+The shelves continue West.
+~
+~
+0 -1 49214
+S
+#49214
+A dark corridor in the Library Maze~
+   This is a corridor.  There are no light sources!  The corridor
+continues East and South.  There is shelves full of books everywhere!
+Let's hope you don't get lost here.
+~
+492 ad 0 0 0 0
+D1
+The shelves continue East.
+~
+~
+1 -1 49213
+D2
+The shelves continue South.
+~
+~
+0 -1 49210
+S
+#49215
+Master Ultan's Hideout~
+   This seems to be a reading room.  There are no light sources here!
+There are a few desks here.  The room has only one exit South.
+~
+492 d 0 0 0 0
+D2
+A door leads South.
+~
+~
+1 -1 49213
+S
+$
\ No newline at end of file
diff --git a/lib/world/wld/index b/lib/world/wld/index
index 75c40f4..817743a 100644
--- a/lib/world/wld/index
+++ b/lib/world/wld/index
@@ -185,6 +185,7 @@
 345.wld
 346.wld
 491.wld
+492.wld
 555.wld
 556.wld
 653.wld
diff --git a/lib/world/zon/491.zon b/lib/world/zon/491.zon
index ce0baf6..48378a3 100644
--- a/lib/world/zon/491.zon
+++ b/lib/world/zon/491.zon
@@ -11,10 +11,11 @@ M 0 4901 1 49102 	(the waiter)
 G 1 4905 100 -1 	(a zine)
 R 0 49101 4900 -1 	(a bulletin board)
 O 0 4900 99 49101 	(a bulletin board)
-R 0 49103 4906 -1 	(a sink)
-O 0 4906 99 49103 	(a sink)
+R 0 49103 49103 -1 	(a sink)
+O 0 49103 99 49103 	(a sink)
 R 0 49104 49104 -1 	(a key)
 D 0 49110 1 2
 D 0 49111 3 2
+D 0 49112 0 1
 S
 $
\ No newline at end of file
diff --git a/lib/world/zon/492.zon b/lib/world/zon/492.zon
new file mode 100644
index 0000000..df971d6
--- /dev/null
+++ b/lib/world/zon/492.zon
@@ -0,0 +1,35 @@
+#492
+GrenzlandMUD~
+The Library Maze~
+49200 49299 15 2 d 0 0 0 1 7
+M 0 49200 8 49200	(a book worm)
+M 0 49200 8 49201	(a book worm)
+M 0 49200 8 49201	(a book worm)
+M 0 49200 8 49202	(a book worm)
+M 0 49201 5 49202	(an apprentice)
+M 0 49201 5 49203	(an apprentice)
+M 0 49200 8 49205	(a book worm)
+M 0 49202 2 49206	(a journeyman)
+E 1 4906 99 16		(a dagger)
+M 0 49200 8 49207	(a book worm)
+M 0 49200 8 49208	(a book worm)
+M 0 49201 5 49209	(an apprentice)
+E 1 4906 99 16		(a dagger)
+M 0 49203 3 49210	(a book thief)
+M 0 49203 3 49212	(a book thief)
+M 0 49202 2 49213	(a journeyman)
+E 1 4906 99 16		(a dagger)
+M 0 49204 1 49215	(master ultan)
+E 1 4906 99 16		(a dagger)
+G 1 4905 99 -1		(the grenzland zine)
+D 0 49200 2 1
+D 0 49203 0 1
+D 0 49205 2 1
+D 0 49206 0 1
+D 0 49208 0 1
+D 0 49210 2 1
+D 0 49211 2 1
+D 0 49213 0 1
+D 0 49215 2 1
+S
+$
diff --git a/lib/world/zon/index b/lib/world/zon/index
index 268a42b..56579c3 100644
--- a/lib/world/zon/index
+++ b/lib/world/zon/index
@@ -185,6 +185,7 @@
 345.zon
 346.zon
 491.zon
+492.zon
 555.zon
 556.zon
 653.zon