A really good collection

John Christian Freund, The Dark Blue, vol. 1, Londres, Sampson Low, son, and Marston, 1871, p. 702

Within this little pond are many species of caddis and several of May-flies-at least, of these insects in the preparatory condition. A really good collection of caddis-tubes can be procured from this spot, and I was rather surprised to find in ir curved and conical tubes of Sericostoma, which are made of sand and tiny fragments of stones.