The artist's unpublished papers (deposited at the Royal Academy in 1977) which give an account of his career and his thoughts about art and life, contain the passage:
The use of mysticism is for comfort. when the world grows dim in old age. our senses are dulled. it is the final truth. ... Perhaps it is only in a certain ripeness that one can enter this kingdom of abstractions this epitome of Perfection as far as we know it. ... More and more divorced from particulars. Persons become Types. material becomes pattern. Incidents rhythm. Colour independent of the substance of decoration.Also in the Royal Academy archives is a defence of Sims's state of mind in the last four months of his life, written by a Mrs Younger to the President of the Academy on 20 April 1928. She gives details of Sims's ongoing work and normal behaviour, but explains that he was suffering from insomnia, for which he was taking a drug: 'I write this because people are apparently trying to keep his work out of the Academy on the grounds that he was insane, and I thought you might let it be known that he was never more normal.' Soon after Sims's death, his friend the artist Harold Speed wrote that these last paintings reflected his completely changed mood after he moved to London from Sussex in 1920:
To those who knew Sims they were the most poignant expression of the anguish he was suffering ... Technically these pictures are very interesting, as an attempt at abstract form and colour expression, used legitimately to express an abstract state of mind ... All the clashing lines and jagged edges and violent colours that startle one in these pictures are not a mere meaningless whim, but a vivid expression of a tortured state of mind ... There upon canvas was his poor tortured spirit laid bare.The Tate owns one of the studies for this work (Tate Gallery T07299).
Charles Sims, ed. Alan Sims, Picture Making: Technique & Inspiration, London 1934, pp.127-30
Harold Speed, 'Charles Sims, R.A.', The Old Water-Colour Society's Club 1928-1929, vol.6, London 1929, pp.62-4