1956 MES FP Heather Kotake (Elmslie) volunteers as a Distributed Proofreader for Project Gutenberg, a volunteer effort to digitize and archive cultural works. She was recently working on a history of the Edinburgh Merchant Company on a particular piece about a lecture that was delivered to them in 1859 by Robert Chalmers, author of Traditions of Edinburgh. This lecture is available online and mentions Mary Erskine. You can access the lecture at http://www.gutenberg.org/ebooks/61947.
If you would like to volunteer to assist with Project Gutenberg, details can be found here https://www.pgdp.net/c/.