Hi Philip,
As you can see, the link you sent was successful.

Regarding the book referenced by Martin Doutre.

It's a very good book, hardcover of 104 pages. I bought it second-hand as it only had one printing ( that I am aware of), and was self published by Donald L. Lenzen, in June 1989. It's Library of Congress Catalog Card number is #89-91279 (not that that probably matters!). Jon Bosak's " The Old Measure" pub PINAX in August 2010 is an excellent look at the history and lineage of the American Customary Measures.