Manuscript score of 'Cader Idris', an arrangement for quintet, with parts for oboe, violin, viola, cello and piano. Published: Mansel Thomas Trust, Ref: MT121 as 'Welsh Traditional Melody Arrangements', for Oboe, Violin, Viola, ‘Cello & Piano'.
Incomplete rough manuscript score of 'Fanfare for six trumpets', together with a photocopy of a complete version. Published: by Mansel Thomas Trust, Ref: MT268.
Hyfryd fugeiliaid = What is this fragrance?,
Manuscript full score (without words) and photocopy of chorus part of 'Hyfryd fugeiliaid = What is this fragrance?', arranged for mixed voices and strings/harp. Parts for violins, viola, cello, bass and harp. Published as Quelle est cette odeur agréable? - What is this fragrance? - Pa beth yw'r hyfryd sawr? by the Mansel Thomas Trust, Ref: MT090 [1998?].
Two manuscript scores, one marked 'copy incomplete', of 'In dulci jubilo', for mixed voices and piano/organ. Published as 'Be merry, I pray you' by Novello, 1955, and as No. 3 of 'Three songs for Christmas' by the Mansel Thomas Trust, Ref: MT085 [1998?].
Manuscript score of the old Welsh carol 'Trymder' (words, Robert Davies (Bardd Nantglyn)), arranged for unaccompanied mixed voices. Published Magor: Mansel Thomas Trust, Ref: MT087 [1998?].
Manuscript score (without words) of 'The first Christmas', for solo voice, with orchestral parts, written November 1961, scored December 1962. Version for solo/unison voices and piano published Magor: Mansel Thomas Trust, Ref: MT098 [1998?].
Manuscript score (without words) of 'Sans Day Carol', a Cornish traditional carol arranged for solo/unison voices and orchestra. Version for solo/unison voices and piano/organ published Magor: Mansel Thomas Trust, Ref: MT096 [1998?].
Manuscript score of 'The holly and the ivy', arranged for solo voice, chorus and orchestra, together with the chorus score of the refrain, and orchestral parts. Version for mixed voices and piano/organ published Magor: Mansel Thomas Trust, Ref: MT099 [1998?].
Incomplete manuscript score (without words) and incomplete parts of 'Flemish carol', arranged for solo voice and orchestra.
Incomplete score (without words) and incomplete parts for an arrangement of the French carol, 'In the town', for solo voice and orchestra.
Listen, listen, have you heard?
Manuscript score (laminated) of the carol 'Listen, listen, have you heard?' (words, Marjorie [Margery] Morrell) for solo or unison voices and piano/organ, composed at Treadam, October 1973.
Manuscript vocal score of 'The Penmark Carol', for unison or solo. The manuscript is not in the hand of the composer and is 'not for publication'.
Manuscript score and instrumental parts (3 cellos) of 'A carol for a family'. Published Magor: Mansel Thomas Trust, Ref: MT102 [1998?].
Photocopy of a manuscript vocal score of 'My ain folk' by Laura Lemon. An arrangement for solo and T.T.B.B. Published: Mansel Thomas Trust, Ref: MT018.
Photocopy of a manuscript vocal score of 'Iona boat song'. An arrangement for solo and T.T.B.B., Edge of page (p.1) lost in copy. Published: Mansel Thomas Trust, Ref: MT019.
Fantasia on famous Welsh songs,
Manuscript chorus score of 'Fantasia on famous Welsh songs (Airs)', comprising 'The bells of Aberdovey', ' Forth to battle', 'The gentle dove', and 'The march of the men of Harlech'. Published London: Chandos Music Ltd., 1968.
Photocopy of a manuscript vocal score of 'The ash grove', arranged for male choir (T.T.B.B.).
Manuscript score (without words) and orchestral parts of the Welsh hymn-tune 'Llwynbedw' by J. T. Rees, arranged for male voices and orchestra. Published: Mansel Thomas Trust Ref: MT010.
Manuscript orchestral score (without words) of the Welsh hymn-tune 'Dies irae' by Joseph Parry, arranged for male voices and orchestra. Includes orchestral parts, together with a manuscript score of his arrangement for male voices and piano. Published Magor: Mansel Thomas Trust, Ref: MT011 [1998?].
Manuscript orchestral score (without words) of an arrangement of Joseph Parry's hymn-tune 'Aberystwyth', for male voices and orchestra. Includes orchestral parts.