It[Oil] was used to make kerosene, the main fuel for artificial lighting after overfishing led to a shortage of whale blubber.

Here it was, in black and white: More than 50 percent of our membership Tenderfoot Scouts, about 25 percent Second Class, only 20 percent First Class or more! … Set a goal—something like First Class or more before '54! or, if you are more ambitious than that: First Class or bust, by September Fu'st!

[…] the formation of the "stuffed ” variety is spatially and genetically closely related to the incomplete albitization of the graphic and apographic pegmatite.

(Here's a brief primer on the religions of the Thronesiverse, if you're curious.)