Dormant, Abeyant, Forfeited, and Extinct Peerages @ p. 572, Welles, Barons Welles
The cited information was published by Burke's Peerage, Ltd., London, England, 1883, held in
{R500171277} (Ref: p. 572, Welles, Barons Welles) The author/originator was Sir Bernard Burke.