From Harry Macy on April 2, 2020:
"The folks at the Bowne House in Flushing, Queens, are organizing a reunion of families that have been associated with the house, which definitely includes Underhills. " There are Townsend descendants as well.
There will be an article about this house in an upcoming News & Views newsletter. See the link to their website below. Of interest would be the Descendants link under the Learn selection at the top.