Vivian Lincoln's Montague Grade School Botany notebook, from the 1930s or so I would guess. I bought it for the page of leaf drawings with labels alone, shown in first photos, which to my eye is just right--but there are delights sprinkled throughout, and the watercolored sweet pea on the cover is pretty great too (as is a page with a pair of pansies, one of them watercolored blue and pale yellow, too.)

8 1/4" x 7 1/8". 12 pages total plus cover. 15 pp. filled. All drawings pictured, and all in good condition.