I, too, was researching Alderson ancestors in the UK. They were also from the Swaledale area in Yorkshire County (NRY) and it became too complicated to figure out who was who. I joined the Alderson Family History Society and they provided me with great info back to the 1600s. It didn't cost that much for the wealth of info that they provided. You can contact Peter Alderson in the UK at email@example.com or Bernard C. Alderson in the US at BCALDERSON@aol.com.