The bilge is the lowest point of a ships inner hull.
These images of the bilge of the Lady Sherbrooke show how large the wood was that was used for the construction of the sections of the boat which were required to sustain constant vibrations and the harsh elements of travel in Canada.

Note in the first image that each of the pieces was tagged and identified with a number so that if any object was removed it could be relocated to its proper place. Similar to putting together a puzzle every recordable piece was carefully measured and drawn to scale so that a reconstruction could be performed at a later time.