EtNH3+(NG3−) is generally considered as the first reported room temperature ionic liquid which was synthesized and characterized by Paul Walden in 1914. But the present investigation finds that EtNH3+(NG3−), a similar kind of ionic salt which is liquid at room temperature, was synthesized by Sir P C Rây three years earlier (in 1911) to Walden. Unfortunately, the latter work had not been paid any attention for more than a century because of unknown reasons. As per literature review, henceforth, Sir P C Rây and his coauthor (J N Rakshit) of that very particular synthesis of the ionic compound which was liquid at room temperature should be regarded as the discoverer of room temperature ionic liquid.