Durer who copied them, omitting the inscription, added to the second impressions his own monogram. In his diary he designates them simply as "_Die sechs Knoten_" (see THAUSING, Life of A. Durer I, 362, 363). In Leonardo's MSS. we find here and there little sketches or suggestions for similar ornaments. Compare too G. MONGERI, _L'Arte in Milano_, p. 315 where an ornament of the same character is given from the old decorations of the vaulted ceiling of the Sacristy of S. Maria delle Grazie.] [Footnote: 680, 17. The meaning in which the word _coppi_, literally pitchers, is here used I am unable to determine; but a change to _copie_ seems to me too doubtful to be risked.] Stubborn rigour. Doomed rigour. [Footnote: See PI. LXII, No. 2, the two upper pen and ink drawings. The originals, in the Windsor collection are slightly washed with colour. The background is blue sky; the plough and the instrument with the compass are reddish brown, the sun is tinted yellow]. Obstacles cannot crush me Every obstacle yields to stern resolve He who is fixed to a star does not change his mind. [Footnote: This text is written to elucidate two sketches which were obviously the first sketches for the drawings reproduced on PL LXII, No. 2.] Ivy is [a type] of longevity. [Footnote: In the original there is, near this text, a sketch of a coat wreathed above the waist with ivy.] Truth the sun. falsehood a mask. innocence, malignity.