ginge
Only a few ledger records still exist for the Hollenbeck marked guns and I understand those records are for Hollenbeck guns that remained in inventory when the company was reorganized into the Three Barrel Gun Company, so it's unlikely that you'll find an entry for gun #236. But the majority of the ledger records for the Three Barrel Gun Co. and Royal Gun Co do exist, so the probability is high that David can find some information on gun #874.