A lead swinger

The sailor in the picture is holding a sounding lead. This was used to find how deep the water was. If the water was too shallow, the ship could run aground.

The sounding lead is made up of a lead weight and a line. Here is a drawing of one of the weights found on the Mary Rose.

sounding leadThere is a hole in the top of the weight for the line to be strung through. At the bottom is a small hole that would have held a piece of sticky tallow (animal fat).
Can you guess what this was used for?