From the January, 1929 issue of Erie Railroad Magazine:
I.S. Van Inwegan hauled train 90 with 75 cars between Port Jervis and Croxton in three hours and 27 minutes, despite unavoidable delays of 48 minutes. He was complimented by New York Division Superintendent Kline for the fast run.

From the February, 1929 issue of Erie Railroad Magazine:
I.S. Van Inwegan, engineer, and E.A. Latier, conductor in charge of train 90, 58 cars, were congratulated by Division Superintendent Kline for making the (New York) division in 2 hours 50 minutes.

From the April, 1929 issue of Erie Railroad Magazine:
A.L. Kline, Superintendent, has commended I.S. Van Inwegan, engineer at Port Jervis, for the good performance on train 90, which left Port Jervis with 98 loaded cars, 3,527 tons, and arrived at Hackensack Bridge in 4 hours 2 minutes between the two terminals, notwithstanding a 40 minute delay to switch cars on account of hot journals or at local points, 43 minutes for signals, and 5 minutes for releasing helper from head end at Graham Junction. Engineer Van Inwegan made no water stop on the division with engine 3189 on this train.

From the September, 1933 issue of Erie Railroad Magazine:
New York Division engineer I.S. Van Inwegan of Jersey City, was retired recently on special allowance payroll at age 67 after 44 years, 10 months of service.

From the November, 1933 issue of Erie Railroad Magazine:
Isaac Samuel VanInwegen, veteran New York Division Engineer, has been retired on special allowance after continuous service of 44 years and 10 months. Mr. VanInwegen began as a fireman October 31, 1887, was promoted to freight engineer in 1891, and to passenger engineer in July, 1907. He is 67 years of age. Mr. VanInwegen lives at 96 Orange Street, Port Jervis, where he frequently meets with old friends of earlier days and relives his experiences on the railroad.

From the October, 1936 issue of Erie Railroad Magazine:
Isaac Samuel VanInwegen, 70, retired New York Division engineer of 45 years service, died at his home, 97 Orange Street, Port Jervis, Sept. 16th (1936), after a long illness. Surviving relatives are his wife at home; one son, Frank G., and two daughters, Ada, wife of Charles C. Hamilton, and Pearl M., all of Port Jervis; four sisters, Mrs. Maria Cranse of Scotchtown, Mrs. Ophelia Tyrell and Mrs. Sadie Dexheimer of Middletown, and Mrs. Laura Buccanning of New Haven, CT; and one brother, Emmett VanInwegen of Port Jervis. He is further survived by three grandchildren, Hazel, Shirley and Charles Hamilton, all of Port Jervis.