"My ordinance was as follows; 3 double-barrel rifles, by Purdey, William Moore and Dickson of Edinburgh - the latter a two-grooved, the most perfect and useful rifle I ever had the pleasure of using"
He, R. Gordon-Cumming writes circa 1850 concerning his hunting adventures in Africa in 1843, had a high opinion of the Dickson also, but I believe, rather strongly I might add, that his opinion holds far more weight!!!!!!!