SIRIS was composed in Annaghmakerrig, Geneva and Dublin between 27 July 2005 and 20 April 2006.

It is dedicated, 'in solidarity', to the pianist Ian Pace who commissioned it with funds from the Arts Council of Ireland, An Chomhairle Ealaíone.	

The title was borrowed from the 18th century Irish philosopher George Berkeley, and means both "river" and "chain".

Siris consists of four closely linked pieces with a total duration of some 25'.

There are several performance possibilities.
The entire cycle may be played as four pieces separated by pauses at the player's discretion.
The entire cycle may be played as one extended piece, using the linking possibilities mentioned in the score. This is the option Ian Pace is choosing for today's performance.
The player may mix these options, e.g. linking I and II, pausing, then linking III and IV .
Each piece may be performed separately (Siris I, Siris II, etc.).