As soon as it is arrived at the size and strength necessary for the beginning its cod, it makes its web; this is his first day's employment; on the second he forms his cod, and covers himself almost over with silk; the third day he is quite hid; and the following days employs himself in thickening and strengthening his cod; always working from one single end, which he never breaks himself; and which is so fine, and so long, that those who have nicely examin'd it affirm, that each cod contains silk enough to reach the length of six English miles.