The white spermaceti oil in the head cavity of sperm whales was a valuable commodity, much sought after by whalers, as it could be turned into high-quality candles. They burned with a bright white light and were odourless. The candles shown here are held in the Whanganui Museum, and were made by Prices, the leading candle manufacturers in Victorian Britain. Since most of their candles were derived from coconut oil, palm oil and, increasingly, paraffin wax, these ones were top of their line.