How in the world is it possible that I didn't see the mistake until after 4" into the leg? Without wasting time on self-pity, I immediately sent it to the frog pond. Now I am almost to the heel. Some new FO is on the way!
I have learned something though. Many fellow knitters seem to loathe working on cables. For me, lace pattern is a great challenge. I make much more mistakes knitting lace than cables. New England is a pattern with heavy lace pattern. I need to have very good concentration and memorizing the pattern seems to be impossible for me. But I can tell you it's worth the effort - it is beautiful.