I find that B[enjamin]. M[arston]. Watson sent me from Plymouth, July 20th, six glow-worms, of which two remain, the rest having escaped. He says they were found by his family on the evenings of the 18th and 19th of July . . .

  I kept them in a sod, supplying a fresh one each day. They were invariably found underneath it by day, next the floor, still and curled up in a ring, with the head within or covered by the tail . Were apt to be restless on being exposed to the light. One that got away in the yard was found again ten feet off and down cellar . . .