An American influence began to appear in Miller's work following a 1902 fact-finding visit to the USA by Matheson. An early example was Olympic House (1903), a plain rectangular speculative office development in Glasgow's Queen Street, followed by the Anchor Line Building (1905–07) on St Vincent Place. The façade of this building is of white faience tiles, the first time that a Scottish architect had used this material. It developed further following the appointment in 1918 of Richard M Gunn as chief draughtsman and designer, which resulted in designs such as the McLaren warehouse (1922) in George Square, and the massive classical Head Office for the Union Bank of Scotland (1924) in St Vincent Street.