From the Project Gutenberg version of Exercises in Knitting by Cornelia Mee.
"Cast on 108 stitches." (25 sts per repeat times 4 repeats = 100 sts, so 8 sts left over for the edges.)
Shown with a cast-on count of 50 stitches.
1 2 3 4 5 Horizontal repeats
1 2 3 4 5 Vertical repeats