Chichester, H. M. (2004) 'Gilbert, Sir Walter Raleigh, first baronet (1785–1853)’, rev. Roger T. Stearn, Oxford Dictionary of National Biography, Oxford University Press, 2004 accessed 1 Jan 2008
paintingandframe.com
"Map". paintingandframe.com. Archived from the original on 6 November 2019. Retrieved 5 November 2019.