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 : In England, yesterday, villagers were amazed to see a number of youths floating over a field.
S6 : The others, however, returned safely to earth by puncturing their umbrellas before they had risen very far.
P : One boy let go his umbrella and landed on a cow from a height of about ten feet.
Q : Luckily, there were not as many casualties as there might have been.
R : Another ended up in a pond.
S : The youths, it appeared, had inflated their fathers' umbrellas with hydrogen and as a result were borne skywards.
The proper sequence should be: