Avoiding the sunís reflection on the lenses of his field-glasses, the observer raised himself to inspect more fully the camp across the plain. He felt the dry flesh shrink on his face and the skin burn red on the points of his cheek-bones, under a ragged beard. The water-bottle beside him had been dry since the previous dusk, but he opened it from time to time and sucked at the cooler air of its interior, a substitute for water itself.
Then, stiff and ungainly, he stood up. It mattered nothing if they saw him now. With dawn and daylight, the time for suspicion was past. Twenty yards away, the dappled mare arched her neck and got slowly to her feet from the flattened grass. Everything was in place for the event that must follow, though the drama was not yet of his making. The period of his allotted patrol as a Natal Volunteer was not quite over, but he could move freely until the time came for his withdrawal through the camp itself. He had an hour in hand as he led the mare in an eastern semicircle to the near side of the ravine. There was silence now on all sides. By night, the perimeter guards were alert for a footfall or the brushing of grass. In the safety of daylight, no one below would pay him the least attention.
Does "time for suspicion was past" mean that people in the camp stopped being suspicios/cautious in daytime?