Thomas Mason (1844-1924) joined him in 1876, becoming a partner in 1879, and thereafter they traded as Morrison & Mason.

They specialised in building waterworks, docks, railway construction, tenements, villas and public and commercial buildings.

Among these are, the General Post Office, George Square (1875-78); Her Majesty's (now Citizen's) Theatre, 121 Gorbals Street (1878, facade destroyed, 1977); the Clyde Navigation Trust Building (now Clyde Port), Broomielaw (1882-1908); Great Western Road Bridge (1895); Ruchill Hospital (1895-1900) and extensions to Rottenrow Hospital (1905).

In 1886, they were responsible for relocating and rebuilding the Old College Gateway as the Pearce Lodge, University Avenue.

Their most important building in Glasgow is the City Chambers (1882-90).

Outwith Glasgow, the firm constructed the George A. Clark Town Hall, Paisley (1882-85); Mugdock Tunnel (1886) and Birmingham Corporation Water Supply (199-04).

They also built their own residences at Craigie Hall (Mason, 1872) and Sherbrooke House (Morrison, 1896).

Knighted in 1909, Mason managed the firm after Morrison's death and entered public life as a Councillor and served on the Boards of the Merchants House, Trades House and Clyde Trust.

Sources:

• The Bailie, vol. 23, no. 573, 10 October, 1883;
• A [Obit, Morrison], vol 30, 16 April, 1919;
• BA [City Chambers], vol. 20, 20 July, 1883, p. 34;
• BA , [Clyde Trust Building], vol. 20, 7 September, 1883, p. 118;
• Morgan, Nicholas J, in Slaven & Checkland , vol 2;
• GCA : AGN 1698;
• Pollokshields Monthly, June, 1983.