Richard Pepper?

I am looking for information on Richard Pepper Sr. born about 1715 unk where died Nov 21 1760 He married a Martha Alexander (her maiden name is Fox this is her first husbands name) They had one child Richard Pepper born 8-16-1742 in Virginia. I have found a few land deeds on Richard and a will but nothing that will get me closer to knowing who his parents are and where he was born. I have been stuck on this man for almost a year now. I havent the funds to drive to Virginia to try and dig further or I would. I know it was in Sus Virginia near "Peppers Run". Any and all help is appreciated. I already have a membership to ancestry.com so please dont suggest it.