There is one key ingredient that sets the sour apart from the Collins, but as shown here, there are a few other noteworthy ...

A quick and easy guide to a great Tom collins, a super easy and refreshing gin-based cocktail. The original calls for old Tom gin, but London dry works just as well. For the sugar syrup ...

the author of one of the first cocktail recipe books, included it in his Bon Vivant’s Companion, published in 1877! A Collins cocktail (John, Tom, Whiskey, Rum) is originally Old Tom Gin ...