35, is a chamber music composition by Graham Waterhouse, written in 1995 for viola, heckelphone and piano.
[2][3] It is one of few chamber music works for heckelphone, a rare member of the oboe family prominently used by Richard Strauss, Frederick Delius and Paul Hindemith.
[2][8][9] The third movement alludes to a print with riders in two directions and two colour shades, partly complementing each other.
[2][11] Vier Epigraphe nach Escher was premiered in Munich in 1995 by Gunther Joppig (heckelphone), Barbara Sterff (viola) and Graham Waterhouse (piano).
The U.S. premiere took place at the 1998 conference of the International Double Reed Society in Tempe, Arizona.