In Christian art, the emblem of solitude and purity of life. It
was the attribute of St. Hubert, St. Julian, and St. Eustace. It was
also the type of piety and religious aspiration. (Psalm xlii. 1.) (See Hind.)
The White Hart,
or hind, with a golden chain, in public-house signs, is the badge
of Richard II., which was worn by all his courtiers and adherents. It
was adopted from his mother, whose cognisance was a white hind.
Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894