This drawing was done 28 September 2000 during one of the Riverside Choir's rehearsals of Messiaen's O sacrum Convivium. Tim was drawn in the corner of the score at the start of this movement, probably because the basses weren't singing at that point and I could observe. This was done while Tim accompanied on the piano because we can see his head over the top of the instrument, something one can not do when he is seated at the organ (top insets)