Early editions of Aler's work Gradus ad Parnassum: Novus synonymorum, epithetorum, versuum ac phrasium poeticarum thesaurus carry a reproduction of the Imprimatur of Robert Midgley, September 30th 1686.
cerl.org
thesaurus.cerl.org
Pierre Joulet, Synonymorum et Epithetorum Thesaurus (Paris 1652): see A. de Baecker, Publications de la Compagnie de Jésus (Somervogel), Vol. I (1890), columns 164–166. cf Hugh Chisholm, in Encyclopædia Britannica (1910) VIII, p. 192.
doi.org
Zhu, X. (December 2023). "Gradus ad Parnassum: Step or Steps?". Notes and Queries. 70 (4): 270–1. doi:10.1093/notesj/gjad098.
