He was born in Edinburgh on 11 June 1884 the son of William McKay and his wife Elizabeth Anderson.
[2] He was apprenticed as an architect in 1899 also studying at Edinburgh School of Applied Art and Heriot-Watt College.
However, Richardson more or less left all architectural work to McKay, as he had been appointed a full time Inspector for the Ancient Monuments Directorate.
In the Second World War, other than designing some emergency hospitals, and military HQs all work dried up.
[4] Suffering from mental illness, his final years were spent in Craig House, Edinburgh, a private asylum.