The British sailors had always been accustomed to drink their
allowance of brandy or rum pure, until Admiral Vernon ordered those under
his command to mix it with water. The innovation gave great offence to the
sailors, and, for a time, rendered the commander very unpopular among them.
The admiral, at that time, wore a grogram coat, for which reason they
nick-named him "Old Grog," hence, by degrees, the mixed liquor he
introduced universally obtained the name of "_Grog_."