'The drawing represents the aspect of the planet in an 8-inch refractor on March 23, 1918, at 9 hours 0 minutes GMT. The blue-green marking on the right is the Syrtis Major. The enclosed whitish area to the left of the centre is Elysium. At the bottom is seen the N. Polar snow-cap, with what is perhaps snow-covered high ground adjoining it. The Casius appears as a dark wedge-like marking running from the bottom right towards the centre, and connecting it with the Syrtis is the curve of Nepenthes-Thoth which has been so prominent in recent years.'
Phillips, R.T.E.R. and Steavenson, W.H. (eds.) (1923) Splendour of the Heavens, A Popular Authoritative Astronomy. Second edn. London: Hutchinson & Co.
5 x 5" (127 x 127mm) Mount with a 3.43" (87mm) aperture
10 x 10" (254 x 254mm) Mount with a 6" (152mm) aperture
11.15 x 11.15 x 1.77" (283.3 x 283.3 x 45mm) Edge to edge of black hand-crafted solid wood box-frame