Hello
You mighty contact the guys that sell the cd copys of ordanace manuals,I can,t get to there business name right at the moment,( I think it is CSS or something like that
The way the story go,s his great uncle started a ammuniction plant in the mid to early 1800,s, ( might be Smitt and Rubbin )something like that.You can search on e-bay or gunbroker or specialty auctions,just type in artillery,or something like that.I beleive the great nephfew was real involed in collecting and researghing the knee mortar round.Sorry about the brain damage short term memerry loss on the name,you have probably meet and done bussiness with him.
Vinny