A Bootham Old Scholar, Giles Cookson (1993-2000), has created a website to make available online his collection of over 2000 postcards. Many of them are of York, and there are a number of Bootham School. The website is www.thecardindex.com where you can search for postcards and also add comments.
Below are some examples from the website. Visit the website and search for Bootham School to see lots more.
The Dining Room, 1908
The Gymnasium, 1908