For two days I watched the place, but the door was never left open.
At last, hot and tired, I sat down to watch the place.
He had spent two days watching the place, trying to find a way inside.
For about half an hour he just sat and watched the place.
He hung around watching the place for a couple of hours.
He wouldn't have to detail one of his own men to watch the place.
For whatever reason, and there must be one, he hasn't been home the two days I've watched the place.
He'd watched the place for two months before making his decision.
If she is there, have a man watch the place, but don't let her know about it.
They would watch the place during the day, and attack with full force after dark.