This document is a result of a detailed survey and analysis into a historic building designed by Honeyman & Keppie (and Charles Rennie Mackintosh). I will explain the history behind this exceptional piece of late 19th century architecture and where Mackintosh was in his career at the time, before picking apart the detail of the primary public spaces via a 3D CAD model that I have created using surveyed measurements taken over a 5 day period. Supplementary information has been generously supplied by the new owner of the building: architect and GSA graduate Bruce Jamieson, as well as a number of photos taken by employees of Page & Park from a baseline photographic survey undertaken on behalf of Historic Scotland. I will then make the argument that this is one of Mackintosh's first completed architectural designs, pre-dating the Herald building, by comparing graphically design elements from within the Conservative Club to those from later buildings as well as from Mackintosh's artwork and sketches.