Sentinels is really a long, unrelenting march whose pulse never slackens or quickens, and in which slightly quirky military-style gestures are almost always present. Butler imagined four standing players to be acting assentries, standing guard, keeping watch over the seated cellist.
| Instrument | Stryger Ensemble |
| Sidor | 28 |
| Publisher/Producent | Oxford University Press |
| Bidragsgivare | Butler, Martin(Composer) |
| ISBN | 9780193356726 |