M. LANCASTER, whose death was announced o recently, was connected with the Royal Observatory of Belgium for so many years that it is impossible, as it would be undesirable, to disconnect his career from that of the institution he served so well. He saw the observatory grow in extent and reputation under several directors, from Quetelet to Lecointe, and gave loyal and devoted service to each. The site shifted from Brussels to Uccle, where a new and modern observatory replaced the modest building that long did duty, but M. Lancaster remained true to its fortunes. With the change of building and with the enlargement of its usefulness, M. Lancaster had to adapt himself to new conditions, but throughout the continual onward development, his energy and industry contributed not a little to the maintenance of the prestige of the observatory with which he was. so long connected.