RENDERING THARLARION, WHALE or SLEEN OIL

The lamps in the Hall use oil. Sometimes this oil is purchased ready to burn by the barrel. Other times it has to be rendered down into its usable form. The fat from tharlarions, whales and sea sleen are used for this purpose. The fat from these creatures is sometimes purchased in crates. When it is purchased like this it is placed in the ice shed to keep until it is needed.

To render the fat you cook it down very slowly in a thick kettle. This is done outside because the smell of the fat cooking down is quite atrocious. Stir the mixture frequently to ensure it does not scorch. Once it is thoroughly liquified remove it from above the fire and set it to the side. Allow it to cool overnight. The next morning skim off the top layers, the watery part at the bottom is useless, you will want to toss that out, use only the part that rises that remains as thick usable lamp oil.