Carvalho, Emanuel Nunes. עברית לשון מפתח. A Key to the Hebrew Tongue, containing the א״ב Alphabet, with the Various Vowel Points: Accompanied by Easy Lessons of One and More Syllables, with the English Translation affixed thereto, so that the Learner may Understand as He Proceeds. To which is added an Introduction to the Hebrew Grammar with Points, intended to Facilitate the Scholar in His Progress to the Attainment of the Primitive Languages. Philadelphia: William Fry, Printer, 1815. 32 p.