When a full Bible book or a large section of that book is memorized with music it's sometimes hard to keep the songs in order in your head.  With this in mind I've created some mnemonic aids which I use to both to keep the songs in sequence and to retrieve them all.  I call them "peg songs"  or "peg pictures" which drive in memory pegs.  They have been very useful to me , although I find the word pictures more helpful.  So for those of you who are more ambitious, and want to memorize and retrieve a whole book in order, I offer these for your use.