1765 - 1852, 1810-1832 Co-Commissioner of His Majesty's Woods; Forests; and Land Revenues
1797 - 1833, Commissioner of Woods and Forests
1917 - , Forests conservator
1944 - , Verf. von "Valuing tropical forests"; Ind. Wirtschaftswiss.; Technical Dep. of the Africa Region; World Bank; Washington; DC