[Illustration:
| Mr. Dumkins >>--> |------------------------> | | <------------------- | | -------------------> | 1 |<----------------------- | | | | <------------------------| | -------------------> | | <------------------- | | ----------------------->| | <--<< Mr. Podder |
| Mr. Luffey >>--> |------------------------> | | <------------------- | | ----------------------->| 2 | | |<----------------------- | | -------------------> | | <------------------------| <--<< Mr. Struggles |
]
The diagram No. 1 will show that as neither Mr. Podder nor Mr. Dumkins can ever have been within the crease opposite to that from which he started, Mr. Dumkins would score nothing by his performance. Diagram No. 2 will, however, make it clear that since Mr. Luffey and Mr. Struggles have, notwithstanding their energetic but careless movements, contrived to change places, the manoeuvre must increase Mr. Struggles's total by one run.
