The Rodrigo concerto (double woodwind, 2 horns, 2 trumpets and strings) needs real virtuoso playing—it is one of those works which are harder than they sound—but is most skilfully written. The cheerful first movement, starting up with typical Iberian belatedness from apparently idle introductory strumming, may make the most immediate effect, but undoubtedly the finest part of the work is the introspective Adagio, which shows that in the right hands even such seemingly cliché-bound elements as melancholy cor anglais solos and quasi-flamenco fiorilure can still be moving. Williams's reading differs somewhat from Bream's (which I still think superb): he takes the first movement a thought slower and just misses Bream's élan, but gives the finale actually more bite: he plays the slow movement sensitively, less dramatically and more dreamily than Bream (and incidentally changes the notes of the final arpeggio). It is a throughly musical performance, a worthy rival to that by his distinguished fellow-countryman.

-- Gramophone [7/1966, reviewing Concierto de Aranjuez on LP]