W. Priestley
of Gloucester
Was this William Lister, formerly of Lister and Priestley of Dursley?
1884 Advert: 'WM. PRIESTLEY, MECHANICAL ENGINEER, MILL ARCHITECT & VALUER, PILOT TERRACE, SOUTHGATE ST., GLOUCESTER.
PLANS, Specifications, and Estimatss of Steam Engines, Boilers, Turbines, Shafting, Gearing, and all descriptions of Machinery. Horizontal Engines, New or Second-hand, for Sale.[1]
c.1885 Horizontal single-cylinder steam engine at Vaughan and Co, fertilisers, Bristol,[2]