Elsie and Mairi Go to War When they met at a motorcycle club in 1912, Elsie Knocker was a 30-year-old motorcycling divorcee dressed in bottle-green Dunhill leathers, and Mairi Chisholm was a brilliant 18-year- old mechanic, living at home and borrowing tools from her brother. Little did they know, theirs was to become one of the most extraordinary stories of the WWI. Full description