No matter how obscure these defunct towns are there is always seemingly one item in existence. Here's another for Catville. A letter to a Mrs. Orange Brown (could be Braun) at Catville from Hartland, Michigan, April 21, 1863. I won't harp upon Catville much longer but here's the Wikipedia synopsis of the town whose name has an interesting story: "New Boston was first settled in 1827 and was originally called 'Catville' after the initials of the proprietor, C. A. Trowbridge. It received a post office with that name in 1860. On March 20, 1868, it was renamed New Boston, after Boston, Massachusetts."