Common Ground (2026-11-07): string quartet on Graham's chord (cello open D, viola A on the G string, second violin D on the A string, first violin G on the E string), in the grammar of the Tallis Fantasia: D Aeolian with no leading tone, root-position triads linked by common tones, 4/4 and 3/4 shifting with the phrase. The tune is sung four times (violin I; the viola; the cello under parallel triads; violin and viola in octaves), the chord between each; the chord's major third arrives once and is let go; it ends on the chord exactly as it was found. Every bar numbered; the playhead follows the performance tempo map.