Darwin, Voyage of the Beagle, Researches

Darwin, Charles. JOURNAL OF RESEARCHES INTO THE NATURAL HISTORY AND GEOLOGY OF THE COUNTRIES VISITED DURING THE VOYAGE OF H.M.S. BEAGLE ROUND THE WORLD…. New York: Harper and Brothers, 1846. 12mo. 2 volumes. vii, [1], 351; 324 pp., the 12 ads pp. not bound in this copy. Mismatched bindings though both 1/4 leather over cloth. *********** THE FIRST AMERICAN EDITION of this foundational work on biology.
Condition Report: Both spines rather rubbed and faint signs of label removal near base; first volume about 3/8" taller than second. Both titles with abrasions/holes to center and old Mass. public library labels to pastedowns, two text leaves with early ink number to margin (very faded), first 6 leaves of second volumes with faded (very faint) water-stain to upper corner; else mostly clean with some occasional very minor spots of soiling or stains, a few corners faintly creased.