Series I. Linguistics contains Adney's notes and manuscripts about his study of First Nations' languages. The language and vocabulary material is about the Maliseet language, unless otherwise noted; other languages include Micmac, Beothuk, and Algonkian. The material in the folders labeled "Notes" have been left in the original order in which they were found. Some of it may be parts of a manuscript or research for a different topic. Some of the linguistic data about names and places contains correspondence and news clippings, in addition to the notes. This series has been divided into two subseries. Subseries A. Language and Grammar contains notes, manuscripts, and research material about the rules of the various languages that Adney studied. Most of this material was originally in boxes labeled "Miscellaneous language and grammar", with little to no information to further identify it. For this reason, the materials have been left in the order in which they were found, and identified when possible. Subseries B. Vocabulary contains notes, research, and some of Adney's manuscripts on the First Nations' vocabulary.