The Whittlesea Compass attributes explanations can be found HERE
TWC - Letterbox 6
Letterboxing is an outdoor hobby that combines elements of orienteering, art, and puzzle solving. Letterboxers hide small, weatherproof boxes in publicly accessible places (like parks) and distribute clues to finding the box in printed catalogs, on one of several web sites, or by word of mouth. Individual letterboxes contain a notebook and a rubber stamp, preferably hand carved or custom made. This cache is a letterbox hybrid, so it is not at the posted coordinates. To obtain the first stage of the coordinates, solve the puzzle below, and receive further instructions in the checker.
01010011 00110011 00110111 00100000 00110011 00110000 00101110 00111000 00110001 00110111 00100000 01000101 00110001 00110100 00110101 00100000 00110000 00110111 00101110 00110000 00110110 00110000
You can validate your puzzle solution with certitude.
We have chosen locations for caches where safe parking is available. Under NO circumstance should driveways and gates be blocked or used for parking. With nearby property owners in mind, these geocaches have been placed out of view, so as not to cause alarm. If you feel a location is causing concern to nearby homeowners, please let us know.