Nightingale Robber. Ilyá Múromet’s conquest of the Nightingale Robber is his most notable feat. He is a very difficult figure to explain. He is a gigantic bird who has been explained on the one hand as a highway robber who was a great bard, for the Russian solovéy (nightingale) is applied to a minstrel. But it is more probable that there is a confusion of two other words in this one, and that the word solovéy , which has come to mean nightingale, is either derived from sláva , meaning fame, or from the same root as the hostile power whom Ilyá Múromets, in some of the ballads, fights, namely Solóvnik the Grey One. Be this as it may, the version which has come down is that the Nightingale Robber was an enormous bird, whose nest spread over seven oaks, who had needed no other weapon than his dreadful beast-like, lion-like, or dragon-like whistle on which every wall and every beast and every man fell down in sheer terror. The rest of this story may be gathered from the one which has been selected for this book.