In 2001 Drury prepared a conservation plan to guide repair and restoration of the Grange itself. This report, written like the 2001 Plan, takes the understanding, chronology, and conservation principles established in the 2001 Plan as a starting point for the continuation of the project to include St Edward's Presbytery. In order to achieve a detailed level of understanding equivalent to that achieved for the Grange itself, selective removal of 20th century accretions within the buildings was undertaken between 2012 and 2014. The results of that work are presented in this document, with a gazetteer of the historic rooms, as the preliminary to reviewing assessments of significance and applying the policies derived from them. The significance of the two earliest periods of work is highlighted in this conservation supplement, as well as stating that later work was of little significance, or deterimental to the overall significance of the place.