Holbrook & Ware
1841

The Holbrook organ was rebuilt/refurbished by Henry Knauff & Son of Philadelphia, 1871:
"The organ has been thoroughly rebuilt, and a new front has been added , with decorated pipes...Organ builders, Messrs . H. Knauff & Son, Philadelphia."

Monday, February 20, 1871.
"OPENING OF ST. MICHAEL'S EPISCOPAL CHURCH"
"The father of the Rector, Mr. Knauff, presided at the organ"
--from A History of St. Michael's Church Trenton, from the year of our Lord 1703 to 1926, p. 236.

Information from A History of St. Michael's Church Trenton, from the year of our Lord 1703 to 1926, p. 190:

FIRST MENTION OF AN ORGAN
March 1, 1841.
Mr. Wood was appointed a Committee to request Col. Josiah N. Bird to write to Mr. Holbrook if he will furnish us with an Organ, “ equal in capacity of the one he built for the Presbyterian Church in this City and take the one we now own. "

April 12, 1841.
Mr. Holbrook sent a letter stating he would furnish us with an organ , which it was thought would answer our purpose for $800 , and allow us $250 for the one we now have. The new organ was finally ordered at a meeting of the vestry, April 30, 1841: Resolved that Messrs Holbrook & Ware of East midway Massachusetts be employed to build an Organ for the use of the Church, of the capacity and description of the one built by them for the use of the Presbyterian Church in this City , they agreeing to build the same for $ 1000 taking and allowing $ 250 for the one now in the Church in part payment. The organ was delivered and in place by the following December, according to a note under date of December 2, 1841: New organ in the Gallery (A request was made that the manufacturers tune the new organ at a meeting held on Feb. 4 , 1842)."

Updated through online information from David H. Fox.

A new organ, at a cost of $1000 [Replaced an 1820 Thomas Hall; Replaced by John Roberts in 1866. (Pinel)]