Allegation dated 19 Nov 1719. John Trenchard, of Bedford Row, Middx., Esq., widower, & Anne Blackett of St. Andrew's, Holborn, Sp[inster] with consent of her mother Dame Julia Blackett alias Thompson, wife of Sir William Thompson, K[night], of St. Andrew's, Holborn; at St. James, Westminster, or St. George's Chapel, Co. Middx.