The Young and McAllister families were prominent families in the Associate Presbyterian community in Philadelphia. William Young (1755-1829) was a Philadelphia bookseller and later a manufacturer at Rockland, Delaware. John McAllister Jr. (1786-1877) ran the Philadelphia optical firm of that same name. This small collection of papers relate to the Young, McAllister, and Warner families. Approximately half of the material are correspondence from John Young, William Young, John McAllister Jr., and Joseph T. Warner; the other half are miscellaneous documents related to the families and businesses they were involved with including Rockland Manufacturing Company and McAllister Spectacle Company.