Design for William Davidson. In the mid 1890s Mackintosh met William Davidson, a young Glasgow businessman, who commissioned him to design some furniture for his flat in Gladsmuir, his parents' house at Kilmacolm. About 1899 Davidson decided to build his own house, and Windyhill was the first of Mackintosh's private houses. It was completed in 1901 and still survives. Mackintosh designed the furniture for the hall, drawing room, schoolroom and principal bedroom, much of which survives in the GSA collection.