"But if would be vain for me to try to tell just what it was in Miss Mitchell that attracted us who loved her. It was this combination of great strength and independence, of deep affection and tenderness, breathed through and through with the sentiment of a perfectly genuine life, which has made for us one of the pilgrim-shrines of life the study in the observatory of Vassar College where we have known her _at home_, surrounded by the evidences of her honorable professional career. She has been an impressive figure in our time, and one whose influence lives." INTRODUCTORY NOTE On the 17th of December, 1831, a gold medal of the value of twenty ducats was founded, at the suggestion of Professor Schumacher, of Altona, by his Majesty Frederic VI., at that time king of Denmark, to be awarded to any person who should first discover a telescopic comet. This foundation and the conditions on which the medal would be awarded were announced to the public in the "Astronomische Nachrichten" for the 20th of March, 1832. The regulations underwent a revision after a few years, and in April, 1840 ("Astronomische Nachrichten," No. 400), were republished as follows: "1. The medal will be given to the first discoverer of any comet, which, at the time of its discovery, is invisible to the naked eye, and whose periodic time is unknown. "2. The discoverer, if a resident of any part of Europe except Great Britain, is to make known his discovery to Mr. Schumacher at Altona. If a resident in Great Britain, or any other quarter of the globe except the continent of Europe, he is to make his discovery known directly to Mr. Francis Baily, London. [Since Mr. Baily's decease, G.B. Airy, Esq., Astronomer Royal, has been substituted in this and in the 7th and 8th articles of the regulations.] "3. This communication must be made by the _first post_ after the discovery. If there is no regular mail at the place of discovery, the first opportunity of any other kind must be made use of, without waiting for other observations. Exact compliance with this condition is indispensable. If this condition is not complied with, and only one person discovers the comet, no medal will be given for the discovery. Otherwise, the medal will be assigned to the discoverer who earliest complies with the condition. "4. The communication must not only state as exactly as possible the time of the discovery, in order to settle the question between rival claims, but also as near as may be the place of the comet, and the direction in which it is moving, as far as these points can be determined from the observations of one night.