GEN. AMBROSE S. CASSIDY DEAD. His Sudden Demise Early This Morning. ____ Sketch of His Life. In a city where he was so well known, the announcement of the sudden death early this morning of Gen. Ambrose Spencer Cassidy at his rooms in the Antwerp apartment house, on the corner of State and Park streets, will cause widespread sorrow. Gen. Cassidy was apparently in his usual health yesterday when he attended church at St. Mary's, and enjoyed a hearty dinner at 3 o'clock. In the afternoon he began to complain of illness, and by even- ing was obliged to take to his bed. A priest and physician were in attendance as his illness increased, and the last rites of the Catholic church for the living were administered. Later on he lapsed into unconsciousness and between 2 and 3 o'clock peacefully breathed his last. Gen. Cassidy was born in April, 1821, and was a son of the late John Cassidy, who lived then in the large house on the northeast corner of Chapel street and Malden lane, the first house sold out of the Van Rensselaer estate, from which Mr. Cassidy purchased it. Gen. Cassidy as a boy lived here and was educated in the Albany academy. He did not attend college, but entered at once upon the business life which occupied him until nearly the be- ginning of the war. His first position was one in Draper's auction commission house in New York, afterward he received an appointment under the Buchanan administration to a re- sponsible in the New York custom house. In 1861 he enlisted in the Ninety-third New York volunteers, joining and subsequently be- coming captain of Co. I. Before the close of the war he became major and at the close of his service was brevetted brigadier-general. He served under McClellan, _____ with bravery and distinction at Fredericksburgh and elsewhere and was for some months a prisoner in Libby and Andersonville prisons. A compound _________ fracture of the leg troubled him then and his prison experience did not better it at all. He was confined in Libby prison when the "On to Richmond" proceed- ing was instituted, and was conveyed in an open car, suffering as he was, to Anderson- ville. He then suffered from prison fever, and was in very poor physical condition when finally released. After the war he returned to New York and received a municipal appointment to the street department. Ten or 13 years ago he returned to Albany and has lived here since, though not actually in business life. He leaves a widow and four children--two sons, two daughters--the oldest a daughter of about 15. The children are at school in Can- ada. Mrs. Cassidy was a Miss Simmons, a descendant of an old Breton family, though at the time of her marriage she resided in New York. Gen. Cassidy was publicly spirited, patriotic and generous, beloved by all his many friends and acquaintances. He was a Democrat.