


Chirpin’ is the 1977 album by the Persuasions, an a cappella group that formed in Brooklyn in 1962. Art direction by Tony Lane, with a cover painting by Gary Meyer.
The typographic treatment pays homage to the lettering on the iconic Tube map for London Underground from 1908, with larger EndcapS and each letter enclosed in a tile-like box. The fonts used to emulate the hand-drawn sans are Futura Bold and Extra Bold

For comparison: detail from London’s 1908 Tube map