εἰς τετρημένον πίθον ἀντλεῖν → run water into a punctured pitcher, to the perforated jar bale water, labour in vain, labor in vain
ĭdĭŏgrăphus: a, um, adj., =ἰδιόγραφος,I written with one's own hand: liber Vergilii, autograph, Gell. 9, 14, 7.