1911 Encyclopædia Britannica, Volume 6… (1911)
“ A pawn can never move backwards. He can capture only diagonally—one square to his right or left front. A pawn moves like a rook, captures like a bishop, but only one square at a time. When a pawn arrives at an eighth square, viz. at the extreme limit of the board, he may, at the option of his owner, be exchanged for any other piece, so that a player may, e.g., have two or more queens on the board at once. ”
