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.
| Arrangement | String Ensemble |
| NumberOfPages | 28 |
| Publisher | Oxford University Press |
| Contributors | Butler, Martin(Composer) |
| ISBN | 9780193356726 |