The question below consists of a set of labelled sentences. These sentences, when properly sequenced form a coherent paragraph. Select the most logical order of sentences from among the options.
P-But he did not know how to find one at that hour.
Q-It was his first visit to the city and he didn't know where to go.
R-Mohanlal's train was late and it reached Kolkata a little after midnight.
S-He thought he would go to a choultry where he would not have to pay rent.