Without the diagonal, the geometric idea is basically a SHOO FLY design (see left), dating back to the late 19th century Ladies Art Company Catalog, #276. Foland's original patchwork is online at the Spencer Musuem of Art, where more than 800 Carrie Hall blocks are available for study. The four block rendering upper right alternates strips of the same blue, first as light on dark, then dark on light, so as not to interrupt the continuity of the fencing. The block repeats beautifully (see tiling below).

NOTE, for the rendering upper right, compare with Jinny Beyer's QUILTER'S ALBUM OF PATCHWORK PATTERNS (p. 412-10), where it is included on the same page with other continuous, diagonally pieced patterns, such as WHITE MOUNTAINS and a gorgeous variation on ATTIC STAIRS, along with the exceedingly dynamic LOCKED SQUARES. All three were illustrated by Nancy Cabot in her quilt column in the Chicago Tribune in the 1930's.