Dürer 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. Dürer 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.] 681. 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]. 682. 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.] 683. 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.] 684. Truth the sun. falsehood a mask. innocence, malignity. Fire destroys falsehood, that is sophistry, and restores truth, driving out darkness. Fire may be represented as the destroy of all sophistry, and as the image and demonstration of truth; because it is light and drives out darkness which conceals all essences [or subtle things]. [Footnote: See PI. LXIII. L. 1-8 are in the middle of the page; 1. 9-14 to the right below; 1. 15-22 below in the middle column. The rest of the text is below the sketches on the left. There are some other passages on this page relating to geometry.] TRUTH. Fire destroys all sophistry, that is deceit; and maintains truth alone, that is gold. Truth at last cannot be hidden. Dissimulation is of no avail. Dissimulation is to no purpose before so great a judge. Falsehood puts on a mask. Nothing is hidden under the sun. Fire is to represent truth because it destroys all sophistry and lies; and the mask is for lying and falsehood which conceal truth. 685. Movement will cease before we are weary of being useful. Movement will fail sooner than usefulness. Death sooner than I am never weary of weariness. being useful, In serving others I is a motto for carnval. cannot do enough. Without fatigue. No labour is sufficient to tire me.