I don't know if you are still checking this post or if you found your answer. I checked the SC Archives site and there are Revolutionary claims for a Robert Frost and a James Gore in SC as well as Asa Darby. I checked Footnote for Rev pensions for all three, but found none. There is a service record for an Asa Darby in NY and there is an Asa Darbe pension in Connecticut, but his wife was Annie and the Chester County will for Asa Darby lists his wife as Dorcas, so they are not the same man. My ancestor also had a Rev claim in SC, which includes what looks like a pension payment, but have never found a service record or pension record for him. I don't know if SC lost some of their records or if some of SC people simply could not prove their service to get pension.