The morale and health of the crew deteriorated
considerably with the onset of the Antarctic winter, especially
from the 19th of May when the sun disappeared below the horizon not
to reappear for another 63 days.
In: "Resultats du Voyage du S. Y . BELGICA en 1897-1898-1899
.... Oceanographie Les Glaces Glace de Mer et Banquises" par Henryk
Arctowski. 1908. P. 33.
