The Palace of Truth is a three-act blank verse "Fairy Comedy" by W. S. Gilbert first produced at the Haymarket Theatre in London on 19 November 1870, adapted in significant part from Madame de Genlis's fairy story, Le Palais de Vérite. The play ran for approximately 140 performances and then toured the British provinces and enjoyed various revivals even well into the 20th century. There was also a New York production in 1910.

Fork-marked lemurs or fork-crowned lemurs are strepsirrhine primates; the four species comprise the genus Phaner. Like all lemurs, they are native to Madagascar, where they are found only in the west, north, and east sides of the island. They are named for the two black stripes which run up from the eyes, converge on the top of the head, and run down the back as a single black stripe. They were originally placed in the genus Lemur in 1839, later moved between the genera Cheirogaleus and Microcebus, and given their own genus in 1870 by John Edward Gray. Only one species was recognized, until three subspecies described in 1991 were promoted to species status in 2001. New species may yet be identified, particularly in northeast Madagascar.