knots

from Aileen:

Scaffold Knots and Hitches
from Amateur Work Magazine vol. 5

(via):

As a chain is no stronger than its weakest link, so stability of the scaffold is dependent to a great extent upon the security of its knots; hence the importance of knowing the best one to use for the purpose required … A very good proof that the lesson has been learned thoroughly is to tie each of these knots in the dark … The names usually given and their uses are as follows:

6. Granny, or thief, knot; this should not be used, as it will jam tight but not slip (as erroneously supposed), will not “upset,” and consequently is difficult to undo.

29. Catspaw, an endless loop, and used where great power is required.