The OCLC shows about a dozen libraries in the US owning the patterns.
Whether or not any of them will send it via interlibrary loan is
another issue. I was once able to get an LP via ILL, so stranger
things have happened.
Charlene
On Fri, Dec 5, 2014 at 1:27 AM, Lavolta Press
The University of Washington (Seattle, Drama Library) has all three.
1. Pattern diagrams for three nineteenth-century... by Susan Barnwell
Pattern diagrams for three nineteenth-century dresses in the Royal Ontario
Museum, 1834-1843
by Susan Barnwell; Mary Holford; James Loates; Royal