The basic sweater pattern was generated with Knitware Sweaters. The cable motifs are mostly from (the Finnish edition of) Elsebeth Lavold's book Viking Patterns for Knitting.
The "s-hitches" are from the pattern "Harald" (p. 74 in the English edition) and the framed lattices from "Ragna" (p. 52). Many thanks to Dava for telling me the English names of these stitches.
This table runner is part of a Lily Filet Set (picture, pattern in PDF) from FreePatterns.com (requires registration). It is also available in Crochet Newsletter Magazine (1997, No. 89, pp. 40-45).