John (b. 1784) and Jane (b. 1787) COOPER; 1850 census Blair Co., PA

John is listed as an innkeeper, 66 years old. Two older children are listed in the household, David (23, b. PA, painter) and Margaret (also 23, PA). The siblings could be twins (same age cited). They are listed in Holidaysburg, so that is almost certainly where the inn was located, as well. I have an almost certain, and rather important, link to this family group, but desperately need more information on them.