Reaves was one of the early founding members of my club (Lancaster Muzlleloading Rifle Association). He was a prolific cast parts maker and yes, he did number most parts and associate them with various schools. He was very knowledgeable of the longrifles and worked for a while as the gunsmith at the Landis Valley Farm Museum outside of Lancaster. His daughter still goes to shows and sells most of his castings.
Reaves passed away a few years ago, now.