The Robert Pinckard who was married to Martha Lamberth moved to Conejos Co. CO in 1879. These two had a son named Robert who married Eliza Ann Belcher (I thought I had the date, but it isn't in my computer - I'll look into that). They were probably married in Franklin Co. VA and had eight children, most of them in VA. The second to the last was born in VA and died as a 1 yr. old in 1879 in CO.
The Robert you show is one of about seven that I've run across. The one you are talking about marrying Martha Jane Belcher is probably a different line than the one I'm referring to. To make sure we are talking about the same one, we will need to get name, time and place together. Email me and maybe we can sort it all out.