What year was the society, which released the songbook in which "Carol of the Old Ones" was published, founded in Colorado?
H. P. Lovecraft Historical Society The H. P. Lovecraft Historical Society or HPLHS is the organization that hosts Cthulhu Lives!, a group of live-action roleplayers for the "Cthulhu Live" version of "Call of Cthulhu". Founded in Colorado in 1984, it is now based in Glendale, California. Their motto is "Ludo Fore Putavimus" ("We thought it would be fun").
Ars Nova Singers The Ars Nova Chamber Singers is a choral ensemble based in Boulder, Colorado, USA. Founded in 1986, Ars Nova Singers is composed of about 40 selectively auditioned singers from the Boulder / Denver metropolitan area. Ars Nova has achieved significant national recognition, recording ten critically acclaimed solo recordings as well as performing on seven recordings with Boulder composer and instrumentalist Bill Douglas (musician).