Same Fish-In-Barrel, Different Shotguns

From 1937's Summer Moonshine by P.G. Wodehouse:

With the feeling that he might just as well have been on a desert island, Tubby tried again to interest himself in the book which lay open upon his knee. But once more he found it too deep for him. It was entitled 'Murder at Bilbury Manor' and was a whodunit of the more abstruse type, in which everything turns on whether a certain character, by catching the three-forty-three train at Hilbury and changing into the four-sixteen at Milbury, could have reached Silbury by five-twenty-seven, which would have given him just time to disguise himself and be sticking knives into people at Bilbury by six-thirty-eight.

The detective and his friend had been discussing this question for about forty pages with tremendous animation, but Tubby found himself unable to share their eager enthusiasm.

And now for something completely different.