The best known of these justly-named ‘dens’ is that of one Johnstone, who lives in a garret off Ratcliff-high way, and for a consideration allows visitors to smoke a pipe which has been used by many crowned heads in common with poor Chinese sailors who seek their native pleasure in Johnstone’s garret … A similar establishment of a slightly superior — or it might be more correct to say a shade less nauseating — class is that of Johnny Chang, at the London and St Katharine Coffee-house, in the Highway itself.
O’Neill, Gilda. The Good Old Days: Poverty, Crime and Terror in Victorian London (p. 70). Endeavour Press. Kindle Edition.