1911 Encyclopædia Britannica, Volume 7… (1911)
“ This simple method is subject to variations in manufacture, and the addition of a small quantity of Jamaica rum, in particular, is said to much improve the flavour. Dry Curaçoa contains about 39%, the sweet variety about 36% of alcohol. A lighter variety of Curaçoa, made with fine brandy, is known as “Grand Marnier.” ”
