Receiving an academic education, he was engaged in the real estate business, and in 1833, while absent in Europe, was appointed one of the Board of Commissioners to prepare plans for laying out the public grounds and streets of the new City of Brooklyn. He was one of the founders of Greenwood Cemetery, and was instrumental in planning and carrying out the water-front improvements of Brooklyn, at the foot of Brooklyn Heights. He was the first president of the Brooklyn Academy of Music, was active in the organization of the Protestant Episcopal Church in the city, and altogether was one of Brooklyn's most prominent and most useful citizens.
Mr. Pierrepont was one of the founders of the American Geographical and Statistical Society, and for the ten years from 1852 to 1862 a member of its Council.
Actively engaged as he was in business, and with constant demands upon his time from the many philanthropic and religious associations of which he was a conscientious and earnest member, he never failed to attend the meetings of this Society and to manifest by word and deed his interest in its welfare.
It is not given to many men to leave a record of such long-sustained and blameless service as his, equally precious to the few survivors of those who stood with him in the day of small things, and to the later generation that has taken up the good work.
At a meeting of the American Geographical Society held March 29, 1888, the following Resolutions were unanimously adopted :
Resolved, That in the death of Henry E. Pierrepont, one of the Founders of this Society, and for ten years, from 1852 to 1862, a Member of its Council, the American Geographical Society has met with an irreparable loss. When there was little but the sense of duty to bring its members together, Mr. Pierrepont, whatever might be the inclemency of the weather, or the other seeming obstacles in the way, travelled from his distant home to take part in the work of the Society. The interest, thus manifested in the early days, he continued to show to the end of his unsullied life.
Resolved, That this Society sympathizes profoundly with the afflicted family of the deceased, and that a copy of these resolutions be transmitted to them by the Secretary.
It may be possible to confirm family relationships with Henry by comparing test results with other carriers of his Y-chromosome or his mother's mitochondrial DNA.
Y-chromosome DNA test-takers in his direct paternal line on WikiTree:
Rick Pierpont :
Family Tree DNA Y-DNA Test 111 markers, haplogroup R-S4056, Ysearch Q98QJ, FTDNA kit #364331 +
Y-Chromosome Test, haplogroup R-S29