Excerpt from the 1885 Portrait & Biographical Album, Isabella Co., MI.,Chapman Bros., Chicago :
“Mr. Dusenbury received a common-school education, at Marshall, and, at the age of 16 years, went to Kalamazoo, Mich., where he became accountant in the employment of E. B. Walbridge, a miller and grain merchant of that city, where he continued nearly a year. He obtained a situation in the joint offices of the United States and American Express Companies at Bloomington, Ill., where he operated a year, and was called thence to the office of the "American" at Chicago, where he officiated four years as corresponding clerk. In 1866 he went to Cincinnati, and was there interested in the organization and establishment of the City Express Company. At the end of a year he sold out and went to the city of New York, where he again entered the employ of the "American" and continued his connection with their interests untill the fall of 1876, when he came to Michigan. He located at Homer, Calhoun Co., associated himself in commercial business with C. J. Murray, under the firm style of Murray & Dusenbury. The relation existed until the spring of 1880.

The death of his brother Frank, which took place at Mt. Pleasant in January, 1880, summoned Mr. Dusenbury hither. His widowed mother and sister had moved here a year previous, and he deemed it expedient to locate here, as the circumstances of the family required his personal attention, and he accordingly sold his business at Homer to his partner, and transferred his interests and family to MT. Pleasant. His first business transactions were in the line of financial operations, in real estate and other loans. In 1881, associated with his brother William, he established his present business, which includes the operations common to private banking institutions, and also lending on real estate. Mr. Dusenbury is identified with the solid business interests of MT. Pleasant, and is the possessor of considerable real estate in the village where he lives and in Isabella County. He built his residence in 1881, and in the winter of 1884 the Dusenbury Brothers erected a business block at Gladwin, in the county of the same name, where, in company with J.M. Shaffer, they established a trade in general merchandise. Early in 1884 they disposed of their share of the stock and retained ownership of the real estate. “

1870 Census shows him as a lodger in New York City working for American Express. Age is given as 28 which is off by a few years.