I may still have the pamphlet and the reference as I remember it was 13XX and they did not mention the horn dance specifically, only that "the dancers went out". This would still be on record at Lichfield Cathedral Library (I assume).

The only pamphlet I can find is from 1966 & EFDSS Folk Festival at the Royal Albert Hall - Souvenir Programme. It say little more than the Abbots Bromley Horn Dance was made possible by the acquisition of the duplicate set of horns. Presumably the VW library has a copy, but I can donate it if required.