They reached the stair and descended.

When they reached the stair, he made her go first: he must be between her and the terror!

Hugh followed behind the moving tower of his friend, who strode with long, noiseless strides till he reached the stair.

We reached the stair.

As he reached the stair, the little white cat sprang from Lucy's arms, and skipped swiftly after the curious inmate of the kitchen.