Fragment is an adaption of a piano duet originally composed to commemorate the retirement occasion of the composer's first piano teacher, Peter Williams. At the time of its composition, Psathas was engaged in writing his double concerto for percussion, piano and orchestra, View From Olympus, and in mood and musical material, Fragment is related to the second movement of that work.

This version, for marimba and vibraphone, was arranged by percussionist Jeremy Fitzsimons first performed the work with Kristie Ibrahim, together as Double Lateral, in the Ilott Theatre, Wellington Town Hall, Wellington, New Zealand on 2 October 2005.