"Elijah Trowbridge was a farmer, but when a young man removed to Brooklyn (around 1854) and was appointed one of the first  policemen of that city. He married Temperance Muchmore, who was born in Bottle Hill, now Madison, New  Jersey, a daughter of John Taylor Muchmore. Eight children were born of this union, five of whom reached years  of maturity, while four are still living, namely: Phoebe, Charles, John, and Johanna, the wife of George Perkins.  Frank, who joined the one hundredth and forty-seventh New York Volunteer Infantry, and served throughout  the war, was wounded at Cold Harbor and died from the effects of his injuries after the close of  hostilities. Three children of this family died in childhood. The father [Elijah] died in Brooklyn, in the forty-ninth  year of his age, while his wife lived to be seventy-two years of age. After her husband's death, she returned to Morris Co., but later moved back to Brooklyn, where her death occurred."

It is unknown if Elijah's older brother Shubael Trowbridge II, who moved to Brooklyn before 1845, played a role in influencing Elijah to relocate his family to the city around 1854.

FROM JULIA BEERS "A HISTORY OF EARLY MORRIS PLAINS"