In 1857, St. Luke's raised $1,700 for the purchase of a new two-manual and pedal organ from Henry Knauff. The records do not show what became of the 1841 Henry Erben organ, nor do they indicate what became of the 1857 Henry Knauff organ when Henry Knauff & Son built a three-manual and pedal organ for the new building in 1876, though it seems likely that the builders took it in trade. In any event, the 1876 instrument seems not to have been of good quality, for by 1892, "the inadequacy of the organ was becoming more and more apparent." -- 1996 OHS Handbook

The case, while generic Gothic style, resembles several Erben organs and may have been reused.