J. M. M. Dallas and Richard Jordan, 1911 Encyclopædia Britannica, Volume 8… (1911)
“ The seven possible moves have each at different times figured as the general favourite. Thus 24–19, which analysis proved to be the weakest of the seven, was at one period described by the title of “Wyllie’s Invincible.” In course of time it came to be regarded as decidedly weak, and its name was altered to the less pretentious title of “Second Double Corner.” In the Scottish Tournament of 1894 this opening was played between Ferrie and Stewart, and the latter won the game with white, introducing new play which has stood the test of analysis, and so rehabilitating the opening in public favour. ”
