Longfellow, Alden & Harlow

Officially, the firm was Longfellow & Harlow from 1886 until March 1887, with Alden participating as its agent.

The split with Longfellow is described as amicable on page 62 of Margaret Henderson Floyd's book about the firm, and it had more to do with the fact that Longfellow was in Boston and Alden & Harlow had relocated to Pittsburgh and were managing their firm there due to the number of commissions they received.

The architects Frederick G. Scheibler Jr., William L. Steele, and Henry M. Seaver trained in the firm's office.

The best documented picture is for the firm's largest commission: the major Carnegie Institute expansion of 1899-1907.

Here Jones played a key role, assisted by Steele, Richard Hooker, and John Henry Craner.

Alden and Harlow as depicted in Palmer's Pictorial Pittsburgh , 1905
Music Building at the University of Pittsburgh , built in 1884.
The Arnold Arboretum headquarters in Boston, Massachusetts , the Hunnewell Building named after Horatio Hollis Hunnewell , designed by Longfellow, Alden & Harlow in 1892 and completed in 1903.