Antiquae linguae Britannicae thesaurus being a British, or Welsh-English dictionary : containing some thousands of British words more than any Welsh dictionary hitherto published : all the authorities or examples which the learned Dr. Davies gives, in his British-Latin dictionary, from ancient poets, historians, &c. are inserted in this, as they are accurate proofs of the significations assign'd to those words; and the words which are added, are often exemplified in the same manner : and to make this work more compleat, besides the explications and etymologies of words, many valuable British antiquities are interspersed through all the parts of it : to which is prefix'd, a compendious Welsh grammar, with all the rules in English : besides the author's collections from his own reading and observations, and what is contain'd in Dr. Davies's British-Latin dictionary, this work hath been greatly improved out of Mr. Edward Lhwyd's Archaeologia Britannica, Dr. Wotton's Glossary, &c. : and there is likewise addded, a large collection of British proverbs