http://books.google.com/books?id=ZGxHAAAAYAAJ&printsec=frontcover&dq=%22The+Company+Clerk%22&source=bl&ots=ryN4g86kwp&sig=37TZGEFTKs2zCGLuhNq3Cr_1GkM&hl=en&ei=v0heS_rvGYaIswP4z9zPAQ&sa=X&oi=book_result&ct=result&resnum=2&ved=0CAsQ6AEwAQ#v=onepage&q=&f=false
"Also, if a person was left sick in a hospital, and not present on the Battery Muster Roll, was there communication from month to month to determine if that individual was still present in that hospital? It seems as though the same information appears on each Battery Muster Roll--"Left Sick in Hospital in Rolla". How often did they actually check on those soldiers?"
I do not believe that individuals absent, were checked on. Once left, this intelligence was repeated on subsequent rolls until new information was gained.