This has been a labor of love for the past two years, bringing together my interests in photography, history, and my skills as a programmer.
The book is the fruit of extensive research, having located over 2,100 objectively dated photographs from 1840 to 1865.
Other guides exist to help you date photographs, but they are not as accurate as mine, being based small data sets and conventional wisdom (which I have found is *usually* correct). This book is a work in progress; I plan to issue an update next year.
Please drop us a note telling us where and when you are using the article. Sometimes though we struggle to figure out who is actually in the photograph.To help us with that challenge, we often try to determine exactly when the photograph was produced.The book, "Fixed in Time", contains illustrations of hundreds of mat and case styles, identified by the specific years during which they were used.Many styles were used for only a brief time, allowing you to date some early photographs to within a year.