Originally published in 1880.
Brother McCurdy briefly explains the origins of Cryptic Masonry, as well as how it relates to the royal arch degrees. He talks about Cryptic Masonry as a modern extension of Ancient Craft Masonry and how it ties in with the blue lodge degrees. Although short, this is a lovely, introspective, and philosophical piece.
Public Domain (P)2015 Lamp of Trismegistus