1912] Collins,—Papers of Wilkes Exploring Expedition 63 
instances I cannot find that any extra copies were printed at all. The 
volumes of the official edition had no publisher's name on the title 
page, but only “Printed by C. Sherman, Philadelphia " or a similar 
form. Some of the copies of the publie edition are the same, but 
others have various imprints. In most but not in all cases, the reverse 
of the title has “ Printed by C. Sherman” or some form similar. These 
volumes were generally placed by the authors in the hands of some 
publisher, whose name appears on the title; sometimes the work was 
transferred from one publisher to another, and another title used. 
Being sold individually, volume numbers were often omitted, which 
was not unnatural, but it is not so easy to understand why in some 
cases a different volume number from that of the official edition 
should be used. 
I have drawn up a list of these variations from the official set, in 
the copies I have examined in the libraries of Boston and Cambridge; 
it is probable that copies in other places will show additional varia- 
tions. For the convenience of any one who may wish to inspect any 
particular form, I use initials to indicate the library, as follows:— 
BPL, Boston Public Library. NH, Boston Society of Natural 
History. BA, Boston Athenaeum. GH, Gray Herbarium. MHS, 
Massachusetts Horticultural Society. MCZ, Museum of Compara- 
tive Zoology. 
Vol. VI. No volume number on title or back; BA, BPL. No 
volume number on title, Vol. VII on back; BPL, Barton Library. 
Vol. VII. No volume number on title, Vol. VIII on back, Phila- 
delphia, Lea & Blanchard, 1848; BPL, NH. The BPL copy has a 
slip bound in before the false title, dated December, 1847, and an- 
nouncing the atlas, to be ready in the course of 1848. 
Atlas to Vol. VII. Philadelphia, C. Sherman, Printer, 1849; BPL. 
Philadelphia, Lea & Blanchard, 1846; MCZ. Philadelphia, Lea & 
Blanchard, 1849; NH, BPL, Barton Library. 
Vol. VIII. Philadelphia, J. B. Lippincott & Co., 1858, no vol- 
ume number on title or back; NH. Two title pages, J. B. Lippin- 
cott & Co. on first, Vol. VIII; second title with no volume number, 
1858, no volume number on back; BPL, MCZ. 
Atlas to Vol. VIII. Philadelphia, J. B. Lippincott & Co., 1858; 
NH, BA, BPL, MCZ. 
Vol. IX. Boston, Charles C. Little and James Brown, 1848; NH. 
Boston, Charles C. Little & James Brown. London, John Murray; 
50 Albemarle St., 1858; BPL, two copies. 
