• Darwin Archive | 'Insectivorous plants': portfolios, 1860 - 1876 | Experimental treatments and observations, 1874 | proof sheets of 'Expression' including pp 141, 142, 144, 168, 1871-01-01 - 1882-04-30 | proof sheet of 'Expression' p [?] [bottom half of page only], 1871-01-01 - 1882-04-30

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