From G & S, page 373. See also page 335 of Abas & Salman; Plate 13, Figure 23, El-Said & Parman, Tomb Towers, Kharraqan; Wade, page 42; and Persian tiles, Phillips and Bunce, page 150. Also Stronge, plates 15c and 16b, from Agra, India.
This pattern is a member of an interesting class of mathematical patterns.
FROM: TILINGS AND PATTERNS by Branko Grünbaum and G. C. Shephard © 1987 by W. H. Freeman and Company. Used with permission. PP Class 71, [p4g,c4,d1], IH Class 71.
Statistics on this tiling: