Input (grade 13): Henry Walter Bates FRS FLS FGS (Leicester, 8 February 1825 & ndash; London, 16 February 1892) was an English naturalist and explorer who gave the first scientific account of mimicry in animals.
Output (grade 7): Bates and Wallace sailed from Liverpool in April 1848, arriving in Pará (now Belém) at the end of May.