In Markham & Flower, 1881 (p. 975): "It was at one time supposed that the Balaena biscayensis had become quite extinct; but this is certainly not the case. Whales are seen on the Cantabrian coast at intervals of about ten years. [...] On the 25th of July 1850, early in the morning, a whale appeared off Guetaria. Boats quickly pursued it; but the harpooner missed his aim, and the whale went off, heading N.W." The record is clearly described as Righ Whale, but assumed of low certainty given the unusual season.