FULL OF YEARS AND HONOR Death of Gen. Isaac F. Quinby in This City, Yesterday. CLASSMATE OF GEN. GRANT After a Long and Painful Illness He Passed Away at His Home on Prince Street--A Sketch of His Busy Life. After a lingering illness of six months' duration General Isaac F. Quinby died at his home on Prince street, between 6 and 7 o'clock yesterday morning. For a month or more it had been known that General Quinby could not recover, and his death was daily expected. At 2:30 o'clock, yes- terday morning, the General awoke from sleep and asked to be moved. He con- versed for a moment with his attend- ants and then went to sleep again. At 5 o'clock he was resting easily but at 6 o'clock the little life that was left began to ebb rapidly away, and although it is not known exactly at what time he died, as he was unconscious, it is thought that it was about 6:30 o'clock. He was suffering from a complication of diseases, including pleurisy, dropsy, and an affection of the brain. He took to his bed last April. His strong vitality enabled him to withstand the ravages of disease to a remarkable degree, but a month ago he succumbed to the strain and during the most of that time was in a semi-conscious condition, from which he rallied only at rare intervals and for a short time. He suffered intense pain through all his illness. Isaac Ferdinand Quinby was birn near Morristown, N.J., January 29, 1821. He was graduated at the United States Military Academy in 1843, standing first in engineer- ing. He was a classmate and close friend of General Grant. He was assistant profes- sor at West Point in 1845-7, and took part in several skirmishes on the Rio Grande and Vera Cruz lines at the close of the Mexican war. He came to Rochester in September, 1851, to become professor of mathematics in the newly founded university and re- signed from the army March 16, 1852. He held his professorship until the civil war and then became acolonel of the Thirteenth New York regiment. Under his command it marched through Baltimore on the 30th of May, being the first body of national troops to pass through that city after the attack upon the Sixth Massachusetts Regiment on April 19th. Colonel Quinby resigned his commission August 2, 1861, and resumed his chair; but he was appointed brigadier- general of volunteers March 17, 1862, and in the following month was assigned to the command at Columbus, Ky. In October, 1862, he was relieved to take command of the Seventh Division of the Army of the Tennessee. The division was sent to take part in the movement to turn the Confed- erate right flank at Vicksburg by Yazoo Pass, the Coldwater, Tallahatchie and Yazoo rivers. Amid great difficulties General Quinby pushed on to Fort Pemberton where he arrived on March 23d. Finding that there was no ground suitable for camping or moving a large body of troops, and the fire of the small gunboats being ineffectual, he conceived the idea of going around to the east side of Fort Pemberton, crossing the Yallabusha river on a pontoon bridge, cut- ting off the communications of the fort and compelling its surrender; but he also con- structed works for a direct attack and sent back to Helena for heavy guns. The boat that brought them brought orders from General Grant to abandon the movement by Yazoo Pass and General Quinby with- drew his forces from before Fort Pem- berton on the 5th of April. The fatigues and anxieties of this expedition in a malarious region brought on a severe illness and he was ordered home on a sick leave May 1, 1863. But learning, a few days after reaching home, the progress of Grant's movement to the rear of Vicksburg he hastened back, assuming command of his division on the 17th, and taking part in the assault on the 19th and the subsequent movements. On June 5th illness again rendered him unfit for duties in the field, and he went to the North under Grant's orders, remaining in Rochester until July 1st. He then commanded the rendezvous at Elmira till December 31st, 1863, when, convinced that he would not again be able to go to the front, he resigned his commission and resumed his duties as professor in the university. In May, 1869, he was appointed United States Marshal for the Northern District of Neew York, and he held that office during Grant's two terms, holding his professorship also until Septem- ber, 1884. In May, 1885, he was appointed city surveyor of Rochester, and he held that office two terms. He was a trustee of the Soldiers Home, at Bath, and vice- president of the board from the foundation of the institution in 1879 til his resigna- tion in 1886. In addition to his official duties he was frequently employed as con- sulting engineer. He revised and rewrote several of the works in the Robinson course of mathematics, and the treatise on the "Differential and Integral Calculus," in that series, is altogether his. In the spring of 1886 General Quinby was elected by the Common Council as city surveyor, and in 1888 he was re-elected for another term of two years. General Quinby married Elizabeth G. Gardner, daughter of General John L. Gard- ner of the Fourth Artillery, at Old Point Comfort, Va., October 6th, 1848. Twelve children were the result of this union, eight of whom are living: John, of the United States navy; Isaac, of this city; Harry, of Kettle Falls; Arnot, of New Brunswick, N.J.; Edwin, of Mt. Vernon, N.Y.; Mrs. L.G. Scranton, of Mt. Vernon; Ruth, Lois and Carrie Quinby, of Roches- ter. Two brothers and two sisters also sur- vive him. They are Dr. G.A. Quinby, of New York; Eugene Quinby, of Parsip- pany, N.Y.; Mrs. Davis Vail and Mrs. Girney, both of Brooklyn.