John M. Adam was a British sailing competitor at the 1908 Summer Olympics.
He was a crew member on the Mouchette which finished second of two teams competing in the 12 metre class. At the time, only the helmsman and mate were awarded silver medals, while the crew received bronze medals. However, Adam is credited as having received a silver medal in the official Olympic database.
References
John Adam (sailor) Wikipedia(Text) CC BY-SA