Conversation so far:
What did Alfred Russel Wallace accomplish?
Above all, Alfred Russel Wallace's role as the co-discoverer of natural selection and his work on zoogeography marked him out as an exceptional figure.
What did you discover about vaccinations after reading the Alfred Russel Wallace article?
In the early 1880s, Alfred Russel Wallace was drawn into the debate over mandatory smallpox vaccination.
What did Alfred Russel Wallace do in 1890?
Alfred Russel Wallace received honorary doctorates and a number of professional honours, such the Royal Society's Royal Medal and Darwin Medal in 1868 and 1890 respectively
Did Alfred Russel Wallace receive any other doctorates besides professional honours?
Alfred Russel Wallace was also awarded honorary doctorates from the Universities of Dublin (1882) and Oxford (1889)

Question: What was his work on zoogeography?
Self-contained rewrite: What was Alfred Russel Wallace's work on zoogeography?