Add reference: Gardening Illustrated, Vol 25, Nov 21, 1903, p. 483. attributed as a Cant description.

In growth ‘Maharajah’ is strong and bushy, suitable for forming pillars about six feet in height, or for specimen plants in lawns or borders. The foliage is a deep green, very firm and leathery, carried quite up to the bloom, similar to ‘Capt. Hayward,’ which is one of its parents. The buds are formed in trusses of about three to a shoot . . . the flower is large frequently measuring five inches across, practically single, with a finely rounded margin to the petals. The colour varies somewhat – early in the summer it is deep velvety-crimson, but in the summer heat it becomes vivid crimson-red, and the yellow anthers upon this rich ground give a most striking effect. The variety, when established, flowers freely, blooming again in the autumn.