In 1914 May 3 was a Sunday.
Tillypronie (note spelling difference) is a Victorian house in Scotland where Charlotte, Lady Clark of Tillypronie collected recipes and assembled them into a cookbook, published posthumously in 1909. The cookbook does mention serving Brussels sprouts in soup, but doesn’t have a recipe with the same name.
This project is supported by my Patrons on Patreon and donations from other enthusiasts of historic cookery. With your help I can acquire the unusual ingredients and equipment and do the research needed to continue my culinary adventures. Thank you so much!