Statistics for occurrence #1 of “Sleeper” in chapter 9 of Historic leaves, volume 7, April, 1908 - January, 1909:

...early fourteen acres. Sixty years ago Jacob Sleeper was in the wholesale clothing business in Boston, with Andrew Carney, whose name is perpetuated by the Carney Hospital. The firm was Carney & Sleeper , and their place of business was in Ann Street, now North Street, and they supplied the United States government with clothing for the army or navy, or perhaps both. It comes within my recollection...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
Jacob Sleeper 37 34 1 0 0 user votes
Jacob Henry Sleeper 129 0 29 0 0 user votes
J. Henry Sleeper 75 0 7 0 0 user votes
Sleeper 35 0 5 0 0 user votes
Jacob H. Sleeper 12 0 0 0 0 user votes
George Sleeper 10 0 0 0 0 user votes
S. S. Sleeper 8 0 0 0 0 user votes
J. S. Sleeper 7 0 1 0 0 user votes
Chauncey B. Sleeper 6 0 0 0 0 user votes
Henry J. Sleeper 6 0 0 0 0 user votes
J. H. Sleeper 6 0 0 0 0 user votes
John R. Sleeper 6 0 0 0 0 user votes
George H. Sleeper 4 0 0 0 0 user votes
H. S. Sleeper 4 0 0 0 0 user votes
James A. Sleeper 4 0 0 0 0 user votes
W. W. Sleeper 4 0 0 0 0 user votes
George L. Sleeper 2 0 0 0 0 user votes
H. T. Sleeper 2 0 0 0 0 user votes
Henry P. Sleeper 2 0 0 0 0 user votes
Samuel T. Sleeper 2 0 2 0 0 user votes
Solomon S. Sleeper 2 0 0 0 0 user votes
G. E. Sleeper 1 0 1 0 0 user votes
Harry Sleeper 1 0 1 0 0 user votes
I. H. Sleeper 1 0 1 0 0 user votes
John S. Sleeper 1 0 1 0 0 user votes

† This entity has been selected by the automated classifier as the most likely match in this context. It may or may not be the correct match.