1884 Handwritten Letter with Butterfly and Rich History, Jackson NH

This makes me happy for all sorts of reasons, the first and most obvious being the tiger swallowtail butterfly hand-stitched to the top of it--tethered just about 140 years ago, with those two crossed stitches holding it still. "Here is a butter-fly. I helped to catch.  I have seen twenty of these on the road in one spot," writes the sender to "Robbie" on June 22, 1884, in the carefully printed handwriting of a child, probably of age 10 or 11. Adding to its interest is the envelope from Thorn Mountain House / Wentworth Hall in Jackson, NH -- an estate turned grand resort hotel that opened to the public with fanfare in 1883, just a year before the writing of the letter. The complex was developed by civil war veteran General Marshall Clark Wentworth according to the principles of a “cottage system”, popular in Great Britain, novel to the U.S., with Wentworth Hall  (designed as a reproduction of an “English manorial hall of Queen Anne’s day”) serving as the hub around which many cottages