This is the 1923 Brattleboro Vermont Directory as published by H. A. Manning Company, and the volume indicates that this company had been publishing these directories of Brattleboro for 24 years. This directory contains an alphabetical listing of all known residents in Brattleboro, Guilford, Marlboro, and Putney, Vermont, and Hinsdale, New Hampshire for the year of 1923. It also contains a business directory, listing of churches and pastor, streets, societies, newspapers, and other organizations of the localities.
City directories serve as key resources for identifying individuals in a specific location and timeframe. They can provide a general idea of where your forebears resided and pinpoint their exact locations during census years, while also establishing connections with other sources apart from censuses.
Typically, city directories are organized into several sections. For genealogists, the section of greatest interest is the alphabetical list of names, as it might contain information about your ancestors.