1843 William Hall leaves E. Robinson & Co.; founds Wm. Hall & Co., 27 Dock Square, Boston, Mass.
1866 George B. Lothrop leaves Wm. Hall & Co.; establishes George B. Lothrop & Co., at 30 Exchange Street.
1875 William Hall dies in Cohasset, Mass., leaving Wm. Hall & Co to his sons William F., Henry, and Fred.
Pond Hollow Farm (Peabody Residence) Old Westbury, Long Island, NY c. 1910 Julian L. Peabody, Architect Wm. Hall & Co., Manufacturer
East Farm (Archibald M. Brown Estate) Stony Brook, Long Isand, NY c. 1910 Archibald M. Brown, Architect Wm. Hall & Co., Manufacturer
Heublein Tower Talcott Mountain State Park, Simsbury, CT 1914 Smith & Bassette, Architects Wm. Hall & Co., Manufacturer
Littleholme (Harry B. Little Residence) Concord, MA c. 1914 Harry B. Little, Architect Wm. Hall & Co., Manufacturer
Nutley New Jersey Public Library Nutley, NJ c. 1914 Armstrong & DeGelleke, Architects Wm. Hall & Co., Manufacturer
Dormer House Locust Valley, Long Island, NY 1916 Theodate Pope Riddle, Architect Wm. Hall & Co., Manufacturer