Basic darning.

"My god, did the moths have a field day this season.  If I threw out another jumper it would have admitted defeat.  And the cost of invisible mending was too much to bear on such a fine knit.  So I decided to beat the moths at their own game...and I can now sleep with my windows open in spring without fear of airborne retribution."

Mixed sizes of basic darning, one with decorative extended stitch overlay.