Map of British Guiana From the latest Surveys of Schomburgk, Owen, Hilhouse, & others; & Those of Hancock, Van-Cooten, Bouchenroeder, & Bercheyck ... Respectfully dedicated To His Excellency Henry Light Esqr. Governor in & over said Colony By His Excellency's Very Obedient Humble Servant J. Hadfield, Crown Surveyor. George Town Demerara, 1st Augt. 1838. John Arrowsmith. London, Published Augt. 1st 1842, by John Arrowsmith, 10 Soho Square.