Tesserae A, for oboe and piano, is one of a set of short pieces which use a technique of composition related to the idea of a mosaic: small fragments of material, often only three or four notes long, are welded together to form larger structures. At 14 minutes, this work was originally written for Edwin Roxburgh and Harold Lester in 1983. This revised version recasts the original harpsichord part for the piano.