Is there an inventory of the cranes, wrecker, shovels and pile drivers owned by the
B&O? The later wreckers are well documented but there are huge gaps elsewhere.

John,
Try the B&O Yahoo group first. You'll have to join to post. Someone there can usually point you in the right direction. Then try the BORHS. They may have a list or publication that has one. I've had more, faster luck with the Yahoo group, though.