John MacGregor was a man who loved playing sports. He was really good at rowing and even won some big competitions. He also liked playing tennis and golf.
But John wasn't just good at sports - he was also really smart! He studied at a fancy school called Cambridge University and even wrote books about his adventures.
One day, John got really interested in something called "canoeing." This is when you paddle a little boat all by yourself. John was so interested in it that he built his own canoe! He named it the "Rob Roy" after a Scottish hero.
John loved exploring in his canoe. He traveled all over Europe and even went to Egypt and Palestine! People were really amazed by his adventures and he became famous for his canoe trips.
In fact, John was such a big deal that people still remember him today. If you ever hear about someone who likes canoeing, they might say they're a "Rob Roy Canoeist" - that's because John MacGregor was so famous for his canoe adventures!