From Fall River Monitor, Fall River Mass. Dec 19, 1835, pg. 1
LARGE ORGAN.- The Philadelphia Commercial Herald contains the following description of this immense instrument.

"An Organ is now putting up in Grace Church, in this city, which, for dimensions, number of pipes, &c. &c. is scarcely equaled we believe, in this country. It has 1738 pipes, the largest of which is 16 feet in length, and 19-1/2 inches by 17 inches square.
The swell is six feet in height by five feet square and contains 462 pips. There are 29 stop; namely 14 in the great Organ, 9 in the swell, 7 in the choir, and 2 in the pedals. There are three rows of keys , each of which plays a separates Organ, and there is one row of keys which plays the three Organs at the same time.
The frame work of the Organ is of the Corinthian Order, extremely Chaste, and has
a fine appearance from the chancel of the Church.
The whole is the production of Mr. Henry Erben, organ builder of New York. To give some idea of the size of this Organ, we may state that what it has now been raised, weighs 15,000 pounds, though none of the metal pipes have yet come. The bellows alone weighs 11 cwt. In addition to this , we can state, that the cost of the organ was $4,500.

Rebuilt 1876 by John Roberts (known via this announcement in the newspaper):
GRAND ORGAN RECITAL John Roberts, Organ Builder, of Frankford, Philadelphia, having rebuilt the organ of Grace (P.E.) Church, TWELFTH, above ARCH Street, an Organ Recital will be given on MONDAY, May 8, at 8 P.M., by Messrs. W.G. Willmore, F.T.S. Darley, John Goodall, Warren Nichols, S. Strang, H.G. Thunder and D.D. Wood, to which those wishing to hear this really fine instrument are invited.
-- The Times (Philadelphia, Pennsylvania) · 6 May 1876, Sat · Page 3

The organ had 3 manuals and pedals, and over 30 stops. (Ochse)