Philadelphia, July 14. 1746. Advertisement : At the new marble shop at the sign of the Mason's Arms, in Arch Street, Philadelphia, are performed and sold, chimney-pieces, slabs for hearths, monuments, fonts for churches, tomb-stones, and head-stones, with all other sorts of marble work, by George Harison, who serv'd a regular apprentiship to that business, and followed it for several years in London. ...