Helm began to take an interest in the history of dances and dramatic traditions of Lancashire and Cheshire, in part influenced by Margaret Dean-Smith, Librarian of the
English Folk Dance and Song Society (EFDSS), with whom Helm had helped to sort and index the Society's papers. Within a year of his move to Cheshire he had published research on ‘The Cheshire Soul-caking Play’, a type of folk play that had been little studied. During this period Helm, now a member of the Manchester Morris Men troupe, also began to research Lancastrian Morris traditions. Helm joined the Folklore Society in 1954, and from 1958 was on the society's council. Ordish, a 19th-century folklorist who specialised on
mummers' plays, had planned – but never completed – a monograph on British folk drama. Norman Peacock and Roger Marriott. The group co-authored 'A Geographical Index of the Ceremonial Dance in Great Britain', which was published as two journal articles in 1960 and 1961 and
English Ritual Drama: A Geographical Index in 1967.
English Ritual Drama is now seen as a seminal work, being the "first systematic attempt to list every known occurrence of the folk play in Britain and to provide a source for each location". == Recognition and influence ==