S1: Jagdish was tired after the long walk through the thick jungle.
S6: Here, to his satisfaction, he found that there were hardly any mosquitoes.
P: As night fell he came to a swampy place near a lake, where he decided to camp.
Q: At last, in despair, he sprang into the branches of a nearby tree and climbed to the top.
R: But the place was so full of mosquitoes that he found it impossible to sleep.
S: He spread a blanket on the ground and stretched himself out on it.
The proper sequence should be: