Dated from 1701, an author identified as A. J., aka Alexander Justice, published in London a bilingual English-Portuguese and Portuguese-English dictionary under the title A Compleat Account of the Portugueze Language. To this first dictionary of these two modern languages, the author attached a grammar for Portuguese speakers with the title Grammatica Anglo-Lusitanica, a work that was reprinted in 1702 and 1705. Although Justice’s metalinguistic works have been the object of occasional references in works of modern scholars, until now there has been no comprehensive assessment of all major issues related to them. Therefore, this article attempts to report on the editions, structural aspects and other issues related to the grammar’s content, as well as information of bibliographical or similar nature, related to what may be considered the first Anglo- Portuguese grammar itself.