Pseudonyms not found in OCLC: Eastern Hermit, One Who Loves and Honours English Poetry, P. W., Unus de Multis
Campbell, T. The poetical works ...
Child, L. Correspondence between Lydia Maria Child and Gov. Wise and Mrs. Mason, of Virginia, 1860 p. 28 (William Allinghame)
Oxford dictionary of national biography, January 12, 2017 (Allingham, William; poet; b. March 19, 1824, in Ballyshannon, Ireland; d. Hampstead on November 18, 1889; associated with the Pre-Raphaelite Brotherhood; lived in Donegal, Ireland; Ramsay on the Isle of Man; Coleraine; New Ross in Wexford, Ireland; and London)
Dictionary of literary pseudonyms in the English language, 2015 page 253 (Allingham, William (1824-1889); also published as Eastern Hermit; One who Loves and Honours English Poetry; P. W.; Unus de Multus; W. A. (first 6 used in Fraser's magazine); Giraldus (Nightingale valley); D. Pollex (Blackberries); Patricius Walker (Fraser's magazine and Rambles))