Mrs.Grant was to remain beside the patient till twelve, when Miss Trelawny would relieve her.

The new nurse was to sit in Miss Trelawny's room, and to visit the sick chamber each quarter of an hour.

The Doctor would remain till twelve; when I was to relieve him.

One or other of the detectives was to remain within hail of the room all night; and to pay periodical visits to see that all was well.
Thus, the watchers would be watched; and the possibility of such events as last night, when the watchers were both overcome, would be avoided.
When the sun set, a strange and grave anxiety fell on all of us; and in our separate ways we prepared for the vigil.

Doctor Winchester had evidently been thinking of my respirator, for he told me he would go out and get one.