“An exceptionally accurate and accomplished Gaelic scholar and phonetician, [Charles Robertson] was also for over thirty years a diligent collector of facts relating to Gaelic philology and topography, and — to a less extent — of folk-lore. Much of his work on Gaelic phonetics and dialects has been published in the ‘Celtic Review’ and elsewhere.” (‘Scotsman’, 6 August 1928.)

The collection is composed chiefly of notebooks, bound or loose-leaf. Some have many blank pages; only the number of those written on is given. Most of the books are undated.