This pattern is written for intarsia in the round; instructions and a link to a tutorial are given. However, it can easily be knitted flat and seamed.

The lace has both charted and written instruction.

From the pattern:
This lace bag was conceived while I was watching the film Troy. Whether or not you approve of the cavalier handling of the ancient epic, the film’s visuals are stunning: the gorgeous lapis-lazuli blues of the Trojans’ garments really struck a chord with me. So I designed this pouch: small and handy enough for everyday use, with a lace pattern evoking arrowheads and the contrasting colour blocks symbolising the two nations at war. It’s great for holding your knitting, a few necessary items or your copy of Homer. I named it Arrows of Ilium after the antique name for the ancient city.