Index: mbtofhm.c
==================================================================
--- mbtofhm.c
+++ mbtofhm.c
@@ -453,11 +453,13 @@
   levelid[ord]=i;
   sprintf(nam,"%d.LVL",i);
   hamarc_begin(fp);
   fputc(0,fp); fputc(0,fp); // Level version
   fputc(ord,fp); fputc(ord>>8,fp); // Level code
-  fputc(29,fp); fputc(21,fp); // Width/height
+  fputc(28,fp); fputc(20,fp); // One less than width/height
+  // (Width/height can each be up to 64 (stored as 63). Bit6 and bit7 of
+  //  these numbers are extra header flags, currently unused.)
   i=fgetc(stdin);
   i|=fgetc(stdin)<<8;
   // fputc(17,fp); // Select proportional font
   while(i--) {
     switch(j=fgetc(stdin)) {

Index: notes
==================================================================
--- notes
+++ notes
@@ -18,10 +18,11 @@
 * You can use the "har" program to extract and alter lumps.
 * There will be less bugs because it is simpler than SQLite.
 
 Disadvantages of using Hamster archive:
 * It is necessary to rewrite the entire file when it changes.
+* It is necessary to read the entire file to find the lumps.
 
 Advantages of using SQLite:
 * You can read parts of the file at a time.
 * You can alter records without having to rewrite everything.
 * SQL can now be used for user queries and user scripts.
@@ -29,6 +30,22 @@
 
 Disadvantages of using SQLite:
 * There will be extra overhead due to b-trees and other stuff.
 * It may be necessary to deal with untrusted database schemas (unsure).
 * Now SQLite must be included in this program.
+
+Another way would be a hybrid approach. Another file containing the user
+session data is a SQLite database, which is recreated if it was deleted or
+if the level or solution file is newer than it, and stores an index.
+
+Advantages of hybrid:
+* It is only necessary to create an index once.
+* SQL can now be used for user queries and user scripts.
+* User session data can be recorded.
+
+Disadvantages of hybrid:
+* SQLite must be included in this program.
+* Level/solution files must still be rewritten entirely when it changes.
+
+Hero Mesh will rewrite the puzzle set file only on exit, so it is possible
+to do the similar thing in this case, by using the session database.