Children believe it is unlucky to step on the cracks in the flagstones, which are believed to contain poison. It is a game to walk a long distance on such stones without setting foot on the interstices.
Cambridge, Mass.

Children believe it is unlucky to step on the cracks in the flagstones, which are believed to contain poison. It is a game to walk a long distance on such stones without setting foot on the interstices.
Source: Current Superstitions (1896), entry 92.
Fanny D. Bergen, editor.
Modern normalized navigation; the historical attribution above remains unchanged.