U27a, U458: The ms. is written in pencil on paper with hand-lined staves drawn in blue ink

and consists of an alternative version of bars 51-56. Two holes are punched in the left side.

U27A, U542: Row chart written as a carbon copy on hand-lined staves drawn in black ink.

Corrections are in black ink. The ms. is written on a piece of cardboard (21.7 x 23.6 cm.)

watermarked "SHELBURNE BOND" on the verso.

U27B, U543: The recto of this leaf contains a 1 bar fragment of a 6 voice mirror composition

(SSATTB); there are 2 holes at the left side. The verso contains a row sketch of the basic set

and the inversion at the lower 5th divided into hexachords.

U27C, U544: The ms. is written on paper (18.6 x 21.6 cm.) with hand-lined staves in blue

ink; the verso is blank. The 1st bar and top melodic line are written in blue ink; the remainder

of the ms. is in pencil and is crossed-out. It consists of chordal sketches ending in a fermata

based on the basic set transposed a tritone.

U27D, U545: The ms. is written on paper (21.6 x 28 cm.) with hand-lined staves in blue ink

having 2 holes on the left side. The ms. consists of a 6 bar sketch using the basic set. The

verso is blank.