Stonemason's chisel (9)

Chisel used by stonemason.  It has a squared blade with a split, that tapers out to a squared shaft with chamferred corners.  The end of the chisel shows signs of frequent use with the edge well worn and curved over.  The mason's name is stamped on the side.   Also possible mason's marks are scratched on two other sides, may be "AH / AR".   Stone was worked using a range of tools including saws and chisels.  Stone mason's tools have changed very little over the centuries.  Finer shaping and detail was worked by striking chisels like this with a large wooden mallet.