Language: Its Nature, Development and Origin

Language: An Introduction to the Study of Speech

The Internet and Languages [around the year 2000]

Lectures on the Science of Language

Della illustrazione delle lingue antiche e moderne e principalmente dell'italiana procurata nel secolo XVIII. dagli Italiani - Parte II

Opuscula: Essays chiefly Philological and Ethnographical

Duality of Voice

Introduction to the study of the history of language

An essay on the origin of language, based on modern researches, and especially on the works of M. Renan

Primitive culture, vol. 2 (of 2)

Introduction to the science of language, Volume 1 (of 2)