sentences:  The lettering on the Royal Festival Hall and the temporary Festival building on the South Bank was a bold, sloping slab serif letter form, determined by Gray and her colleagues, including Charles Hasler and Gordon Cullen, illustrated in Gray's "Lettering on Buildings" (1960) and derived in part from typefaces used in the early 19th century.It has been described as a "turn to a jauntier and more decorative visual language" that was "part of a wider move towards the appreciation of vernacular arts and the peculiarities of English culture".The lettering in the Lion and Unicorn Pavilion was designed by John Brinkley.