up his "big book" on the subject when Alfred Russel Wallace sent him a similar theory in 1858.
Darwin nglimbakang teorinyané indik "seleksi alam" ngawit saking warsa 1838 raris sedek nyurat "cakepan ageng" ipuné duk Alfred Russel Wallace ngirimin ipun versi teori sané mesib kantenanyané ring warsa 1858.