Website is in German and pattern or images may have been archived (2005), however a PDF version is still available:

German
English

Errata noted by flamingo8228: “It seems to me there’s a mistake in the English version of the pattern. I’m pretty sure there’s an extra Ch 3 in round 2. I think Round 2 should read: Ch 3, 2 dc, 2 dc through chain, Ch 3, 2 dc through chain, 3 dc, (no Ch 3 here) 2 dc through chain, Ch3, 2 dc through chain, 3 dc, 2 dc through chain, etc…”