The watercolour by Charles Pickering is from the Brown Digital Repository. The rank of captain shows as embroidered crown and star badges on each side of his collar. The 1857-pattern doublet has green facings, shown here as bottle green, which were changed to blue after the regiment became royal in 1873. The uniform is basically the same as that worn by the ensign in the photo of 1864 but he has no shoulder plaid. There is probably a smaller fly plaid suspended from the back of his left shoulder. The dress belt is worn on his waist to hold his dirk but the edges of the belt should show as blue. The captain has medals for the Crimean War and probably the Indian Mutiny, but concealed under his crimson sash. For parade dress he has black boots hidden under white spats.
The 1864 Dress Regulations describe the headdress: ‘Bonnet — cocked and feathered with six black ostrich feathers, ten inches deep; skull of blue cloth, united at the back with black ribbons, check band, regimental badge on the left side; black leather chinstrap. Feather — white vulture, eight inches long.’