What is the fine-grained topic of the following text: Surviving drawings submitted to the Glasgow Dean of Guild Court for two projects on the same job-book page, 34 Carrick Street and Holm Street, for the same client, James McMichael & Son, show W.C. additions to tenements. Only return the topic.
W.C. additions to tenements for James McMichael & Son in Carrick Street and Holm Street in Glasgow.