Engagements
The Ibbs and Tillett brochure has this resumé:
A list of engagements, showing the date, venue, work, soloists and orchestra, choir, accompanist and conductor, compiled from John's programme collection, can be read in the book about his life and career, shortly to be available from Lulu.com and Amazon etc., and written by his daughter Janet Kinrade Dethick.
Below are the oratorio engagements in 1961 for which there is a programme:
In addition, there was a celebrity concert in Scotland. The Dublin performance of The Messiah was broadcast by Radio Eireann
The BBC
After an audition in 1953 John Dethick appeared regularly on BBC Radio. The BBC Genome records 39 appearances, and there are two others in which his surname is spelt wrongly (Dethic and Dedhick)
In addition to the broadcasts mentioned on the Home Page here is a brief summary:
Oratorio/Serious songs
Brahms A German Requiem Leeds Philharmonic Chorus. Yorkshire Symphony Orchestra conducted by Sir Malcolm Sargent
J. S. Bach St. John Passion BBC Midland Orchestra Conducted by Roy Henderson
A. Honegger A Christmas Cantata Sheffield Philharmonic Chorus Halle Orchestra Conducted by Hermann Lindars
C. V. Stanford (Songs of the Sea) BBC Northern Orchestra Conducted by Stanford Robinson
G. F. Handel Israel in Egypt The Bach Choir The Jacques Orchestra Conducted by David Willcocks
R. Vaughan Williams Songs of Travel (BBC Midday Proms) BBC Northern Orchestra Conducted by Stanford Robinson
Mozart Benedictus siit Deus (K117) Motet; Vaughan Williams Lord thou hast been our refuge; Beethoven arr. Weingartner Grosse Fuge; Mozart Mass in C (K337) BBC Chorus St. Cecilia Orchestra Conducted by Charles Groves
Recitals
A series of song recitals accompanied by Ernest Lush, Clifton Helliwell, Josephine Lee, Frederick Stone and Keith Swallow
Ensembles
Two appearances on Music Making with the Northern Sinfonia Ensemble and Keith Swallow
Brass Bands
Four performances with the Brighouse & Rastrick Brass Band conducted by Eric Ball and Trevor Walmsley
Two perferomances with the Manchester C.W.S. Band Conducted by Alec Mortimer
Variety
Two performances on 'Those were the Days' with Harry Davidson and his Orchestra