He [John the Marshal] m., 2ndly, Sibyl, sister of Patrick de Salisbury, 1st Earl of WIltshire, and daughter of Walter de Salisbury, hereditary sheriff of Wiltshire and constable of Salisbury Castle, by Sibyl, daughter of Patrick de Chaources (Chaworth). John d. in 1165, before Michaelmas. [Complete Peerage X:Appendix G:93-95]