I recently had an opportunity to purchase an heirloom — a doily by Marguerite Shimmons. Marguerite works in size 100 thread. Size 100!
The doily is about 12 inches in diameter. I don't know what pattern it is. It's possible that it's a combination of one center and a different edging. Nevertheless, I love it.
Lacis in Berkeley, California, has a collection of Marguerite Shimmons doilies in its museum collection.