In addition to personal correspondence and papers, the collection reflects the breadth of the Hendersons’ interests with materials on engineering, the preservation of their house, and many organizations with which they were involved.

A copy of an earlier inventory of the collection can be found in Box 10.

Collection of financial records, photographs and personal correspondence of Edward J. White, an electrical contractor and his company, based in Newark, N.J.

"Programme of a Competition for the Selection of an Architect for a Court House to be erected for Essex County at Newark, New Jersey by the Essex County Building Commission" (1901); Letter from Asa Whitehead to General (Isaac) Andruss requesting a copy of the proceedings of the Bd. of freeholders re the location & building of the new court house, May, 1836; Essex County Bicentennial Commission. "Law Day: Essex County Courthouse Dedication, April 30, 1976."

The collection of consists of 15 scrapbooks of research notes, sketches, original photographs, postcards, and clippings. Most of the material relates to the history of buildings in Newark, but there is also material on other New Jersey cities, on New York architecture, and on historic preservation in other states.