Quilt Notes: WHIRLING SQUARE is illustrated in Maggie Malone's 5,500 QUILT BLOCK DESIGNS (#2720). It is attributed in most sources to the 1930's quilt column by Nancy Cabot. Another design by the same name was also illustrated by Cabot, so there may be some confusion with this one, though she could easily have included both.
Most blocks drafted on any ratio of a 5 x 5 grid have multiple centers in the tiling pattern, creating a sense of precision and energy, and thereby a very vibrant simplicity (scroll below). However it is rare to see an "X" made of squares, which are then split along the diagonals as it is here. An exception would be LABYRINTH, from Maggie Malone's compendium, which includes a diverse collection (pp. 191-237) of "Five-Patch" designs all in full color.
For more blocks employing the dynamic of "whirling," at this site, compare with:
SYMMETRY IN MOTiON
TO MARKET, TO MARKET
also Z AND CROSS