Address delivered by the Rev. T. P. Kirkman ... on the occasion of his presiding at the twenty-first soiree of the Brighouse Mechanics' Institution, January 7th, 1868, 1868 t.p. (Rev. T. P. Kirkman, M.A., F.R.S., Rector of Croft, near Warrington)
On Church Pedigrees, 1872 t.p. (Thomas Penyngton Kirkman)
Alumni Dublinenses (Kirkman, Thomas Penington. Pen. Apr. 6 1829 aged 23. BA 1833 MA 1850 [F.R.S.])
Boase (Supp.) (Kirkman, Thomas Penington, b. 1806 ... PC of Croft near Warrinton 5 April 1839, rector 1845. FRS 11 June 1857 d. Feb. 1895)
ODNB (Kirkman, Thomas Penyngton (1806-1895), mathematician and philosopher. Baptized Pennington, he adopted the spelling Penyngton in later life)