Alasdair,
Can't give you any references, but we have recovered a very limited number
from mid-nineteenth century deposits in Detroit. Memory serves me that vessel
forms were in the range of ca. 1840-1860 molded ironstones, various Gothic-like
designs.
Mark C. Branstner
Great Lakes Research, Inc
210 E. Sherwood Road
Williamston, MI 48895
1-517-347-4793 / [log in to unmask]