Memo:  Harry Patterson says that during the piece "Who Built The Ark", David used a hammer and he used a saw to provide percussive effects.  This was Harry's debut as an instrumentalist.  Harry had to time it so the piece of wood fell off on the very last note.  He went to Croft Lumber and bought a new saw to do the job.  It worked out OK, but Harry was never asked to do another instrumental part.