James Weldon Johnson, Sondra K. Wilson (1995). “The Selected Writings of James Weldon Johnson: Social, political, and literary essays”, p.331, Oxford University Press on Demand
Dispatch, in cipher, to the English Ambassador at the Hague, 31 January 1826, in Sir Harry Poland 'Mr Canning's Rhyming 'Dispatch' to Sir Charles Bagot' (1905)