The papers of Professor Mitchell at Gen. 2271-2290 include poems, plays and an unfinished novel Moth and Peaseblossom which was to followCobweb and mustard seedpublished in 1928; copies of A slim volume; notes and manuscripts; general letters from between the 1920s and the 1980s; papers on educational research; letters to him on education; papers on contemporary poets and artists; and, material on religion and tolerance, and pulpit teaching. There are card indexes for Mitchell's research on Monboddo; letters and papers on his Monboddo research; newspaper and other cuttings on Monboddo; and, genealogical material relating to Monboddo. There is an album of Christmas cards, Victorian and Edwardian ephemera, postcard albums, and material on the history of Dundee. There are personal papers too, and Mitchell's academic hoods.
At Gen. 1948 there are poems and an essay offered for prizes at Oxford, a typescript on paganism, a fragment of a novel, a typescript for a play, a verse drama, and printed material.
At E67.32a there is a collection of papers containing the typescriptsMorte d'Arthur - a play in four actsand Tyrtaeus, or, the Future of War Poetry. The former typescript, from 1922, is a play reflecting young ex-servicemen's attitude to war and the older generation. (Mitchell had noted this in the Rectorial Address of Sir James Barrie delivered at St.Andrews University in May 1922 and which was published in Courage, and he used an incident related by Barrie on p.32 of the address). The latter typescript, Tyrtaeus, written in Newcastle-upon-Tyne in 1928, was intended as one in a series of books to be published by Kegan Paul. These papers also include a letter from publishers Kegan Paul, Trench, Trubner and Co. Ltd. to Mitchell, dated 16 March 1928. It thanks him for sending them the essay on the future of war poetry, but offers regret that they were not of the opinion that the book would meet with sufficient sales to render it a suitable volume for their To-day and To-morrow series. It recommended an approach to the Hogarth Press.