Lovett, Edward. “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.)”. Proceedings of the Society of Antiquaries of Scotland, vol. 21, Nov. 1887, pp. 206-12, doi:10.9750/PSAS.021.206.212.