He would have to return early, setting her research behind by a full month.

He tired quickly the first day and had to return early.

On the afternoon of the third day he returned early.

David had gone home, promising to return early in the morning.

She had returned early to Boston, and was working very late.

He was saved by his father, who had returned early from work.

The others went back to the hotel, promising to return early in the morning.

He returned early in the afternoon to report that no progress had been made.

She's afraid he might return early, and she doesn't have the strength to lie to him.

Of all evenings when she might return early, it was this evening.