Two Shrieves joined the captain in the morning and evening relic-room ceremonies, lighting and extinguishing the domes with the captain's staff, and lowering and raising the entrance to the Shrivenzale's chamber. Another Shrieve fed the Shrivenzale each morning.
Shrieve night-sentries carried whistles to alert the Watch, but were known to sleep on duty. Not highly professional, others were known to accept a drink, or talk among themselves rather than keep watch. (TV: The Ribos Operation)