"Robert Hogg Matthew". Dictionary of Scottish Architects; Biography Report; Basic Biographical Details. Scottish Architects. 2014. Archived from the original on 10 October 2012. Retrieved 28 July 2015.
"Robert Hogg Matthew". Dictionary of Scottish Architects; Biography Report; Basic Biographical Details. Scottish Architects. 2014. Archived from the original on 10 October 2012. Retrieved 28 July 2015.