Hagaman Connection to the Brevoort House Solved

       

The 1898 Year Book of the Chamber of Commerce of New Haven, as seen below, provides the answer to the Hagaman brothers' connection to Brevoort House. The excerpts are from page 35 and page 36:

The "young Hagaman" referred to in the first part of the above text refer to Theodore, Isaac Hagaman's brother. I have typed out the text below:

Young Hagaman then obtained a position in Judson's 

hotel  61 Broadway, New York City, the proprietor of

which was Curtiss Judson, who was afterwards proprietor 

of the Brevoort House on Eighth Street. In 1854, Mr. Judson

gave Theodore, who was then fifteen years of age, a clerkship

in the Brevoort Cafe. Henry Hagaman, his brother was at the 

time head clerk of the hotel. For thirteen years he remained 

at the Brevoort, when in 1867 he and his brother Henry, 

together with Isaac Hagaman, another brother, as silent 

partner, leased the Albermarle House, corner of Broad Street

and 14th street, for a term of ten years.  On February 26, 1876,

Henry died. From this time, and until the expiration of the 

lease in 1877, a little more than a year, Theodore and Isaac

conducted the business, after which the two brothers came

to East Haven to live.