I don't know if Jake Jones at MMU will be checking back in, but I just came upon a document from the Mary Neal archives at the VWML about her visit with Florrie Warren (one of the Espérance dancers, then 18) to the U.S. (New York and Boston) in the winter of 1910-1911.

A report on the visit was published in the Musical Herald in the UK and reprinted in the Esperance Morris Book - II.

Download the pdf and take a look.

The lead paragraph of the article seems to indicate that some teachers in the U.S. had tried to use morris dancing:

"New York and Boston have taken up morris dancing. In the schools also teachers were obliged to teach it, and, having wrong ideas of the dances, they did not like them, but now that they have seen the real thing they are completely converted. Here we have put into the dances the romance of the past and the pride of long possession, but America takes them for what they are worth now. A number of troupes have been started."

...but Neal's comments later in the article, and on the second page seem to indicate that they were introducing it from scratch.

There is also this item from her autobiography about Sharp's interference with the trip.

poster for a May 1911 performance in New York (This was after Neal's return to England. Florrie Warren had fallen in love, remained in the U.S., and been married that spring).

~ Becky in Tucson