Abstract: John A. Bader II (1895-1961) was a Wilmington, Delaware, building contractor active during the 1930s, 1940s, and 1950s. The records are primarily Bader's business papers. The collection includes engineer's field books, diaries of trips, and job notes. Eight volumes contain profit and loss statements, cost accounting for jobs, records of checks paid, and files on individual construction jobs.

Abstract: The Spreckels Sugar Refining Company was the Philadelphia branch of the Spreckels family sugar refining combine. The records are primarily accounts for the construction and operation of the Philadelphia refinery under Claus Spreckels Jr. (1858-1946) between 1888 and 1895.