He began, always, with a sustained tremolo from the violin part, which, for several bars, was unaccompanied, and filled all the foreground; until suddenly it seemed to be drawn aside, and—just as in those interiors by Pieter de Hooch, where the subject is set back a long way through the narrow framework of a half-opened door—infinitely remote, in colour quite different, velvety with the radiance of some intervening light, the little phrase appeared, dancing, pastoral, interpolated, episodic, belonging to another world.