Genealogy Quest

Oxford Co., Maine 1812 half-pay: "Statement of the Names etc. of the Heirs of non-commissioned Officers, Privates, etc. who died in the United States' service, who obtained five years' half-pay in lieu of bounty land, under the second section of the act of April 16, 1816, and who resided in the State of Maine."

Genealogical Research Assistance - Glossaries: "
Glossary of Terms

The study of Genealogy demands that a person become familiar with the precise terminology of other professions and ages, as well as the terminology of genealogy itself."

Epidemics

While not a glossary as such, this list of known epidemics that swept areas of the United States makes a handy reference when seeking out individuals whom disappear suddenly and seemingly without trace.