“Notice of the Gun Flint Manufactory at Brandon, With Reference to the Bearing of Its Processes Upon the Modes of Flint-Working Practised in Prehistoric Times: (With Illustrative Examples of the Tools and Specimens of the Manufacture.)”. 1887. Proceedings of the Society of Antiquaries of Scotland 21 (November): 206-12. https://doi.org/10.9750/PSAS.021.206.212.