Thanks for the info again. As for Owen, we know he was on the 1840 census but not on 1850. I have him on the list of B&O (Baltimore & Ohio) Railroad employees in 1842 as a "finisher" earning $1.42 a day at the Mt. Clare machine shop and listed in the Repairs of Railway and Machine Dept.
As for Baltimore City directories, he's listed in 1833 as a machine maker on Ensor St. (Victor is listed at the same address as a blacksmith) and Owen is listed in 1842 as a machinist living at 35 N. Cove St.