Indentified by Nicholas Marston as a contrapuntal sketch using figured-bass notation to express the intervals between two invertible voices; the upper two staves to be read in the treble clef, the lower in the bass clef.. Fragment, written on one side only, cut from a larger leaf (possible from the bottom inner edge of an oblong quarto leaf), 3 staves visible, 4.5 x 6.4 cm, in brown ink, stitch hole (?from a sketchbook