'On clinant geometry, as a means of expressing the general relatings of points on a plane, realising imaginaries, and extending the theories of anharmonic ratios. By Alexander J Ellis, B.A., F.C.P.S. Communicated by Arthur Cayley, Esq. F.R.S. Febr. 1863. Abstract printed in the Proceedings of the Royal Society, vol.12, pp442-3' Carbon copy of MS, with figures drawn in ink. Text and figures on rectos only. Paper wrappers inscribed 'Prof Augustus De Morgan, with the Author’s respects'.
Part of A De Morgan’s library, given to the University by Lord Overstone in 1871. Former shelf-mark L(P.C.6)