These four letters relate to a show that Devant put on at Balham Hall, south London, on the nights of 5 and 6 December 1892. Powell lent Devant some money to help finance the shows, but the venture made a loss and Powell lost some of his money. Whilst financially disappointing, the shows proved to be of great importance to Devant because it allowed his own illusion Vice Versa to be seen. This resulted in further work at the Crystal Palace and soon resulted in Devant’s first appearance in Maskelyne and Cooke’s entertainments at the Egyptian Hall. The story is told in the Davenport Collection website article David Devant’s first big illusion: Vice Versa by Anne Goulden. The article includes transcriptions of all four of these letters.