John Johnstoun (died c.1773), captain of the Lord Cambden, was delivering GW’s major spring shipment of supplies from England; the shipment comprised a great variety of goods collected from 39 different London shops, including a set of surveyor’s instruments for John Parke Custis and some harpsichord music for Patsy. These were all gathered together and shipped by Robert Cary & Co., which was the major London merchant house for the Custis estates and was subsequently retained by GW after his marriage to Martha Dandridge Custis.