Colquhoun, Archibald Ross (1848-1914). Autograph Letter Signed "Archie Colquh[oun]" to Mrs MacGregor and Discussing Work on his Book "Across Chrysê: Being the Narrative of a Journey of Exploration through the South China Border Lands, from Canton to Mandalay" (London, 1883). Edinburgh: 11, St. Bernard Court, 19 November 1882.