Gentleman: According to an article published by the American gunsmith and writer Douglas Tate, by the late 1880s both Jeffery and Leonard had outlets on Queen Victoria Street in London -- Jeffery at number 60 and Leonard at 147. Shortly after this, Jeffery records show many of their double rifles as being made by Harry Leonard, who was the son of Daniel Leonard, who set up as a gunmaker in Birmingham as early as 1832. Harry Leonard had his workshop at 19 Lench Street in Birmingham. George Ellis, who worked for Leonard as an actioner and jointer, says the firm also built many guns and rifles for Daniel Fraser, whose guns often exhibit the several variations of the shaped boxlock action found on Jeffery rifles. In this article, there is much more information on the history of the Leonard firm. Perhaps this will be of interest. Keith