The following six sentences come from a paragraph. The first and the last sentences are given. Choose the order in which the four sentences (PQRS) should appear to complete the paragraph.
S1 : The officer rose to his feet, trembling.
S6 : A half-hour later he returned to camp.
P : He failed to find him there.
Q : Pulling himself together, he ran rapidly away from the cliff to a point a half-mile from its foot.
R : He was disappointed.
S : He expected to find the horseman somewhere there.
Select the correct sequence.