Hand-powered drilling tools and machines, Low-Tech Magazine
A Collection of Bit Braces
Brace Innovative History: an Overview
The Primitive Wooden Brace
Repair of push-button chuck
John S. Fray & Co.
Spofford Style Braces
Barlow, Ronald S. (1999) The Antique Tool collector's Guide to Value. Gas City, IN: L-W Book Sales.
Another source (for information about all sorts of old hand tools) is:
Walsh, Peter C., Woodworking Tools 1600-1900, Smithsonian Institution. The e-book version is downloadable for free from Project Gutenberg. Information about augers is found starting at location 515.