[citation needed] Borthwick was initiated[3] as a member of the Hermetic Order of the Golden Dawn in July 1891.

This was later described as “splendid work during the war in teaching hundreds of girls the mechanism and driving of cars”.

[5] Her garage, the Borthwick's Ladies' Automobile Workshops in Brick Street in Picadilly, London was an RAC agent into the 1920s.

[1] Borthwick was also a Director of The Stainless Steel and Non-Corrosive Metals Company Limited, set up in Birmingham in 1922 by Cleone Benest, at that time using the name C Griff.

Using Benest's colouring method, the company manufactured lamp reflectors, ornaments, railway fittings and other items, before it folded in 1925.