Conversation so far:
Where was William Randolph Hearst born?
William R. Hearst was born in San Francisco to George Hearst, a millionaire mining engineer, owner of gold and other mines
Where did William Randolph Hearst grow up?
Hearst attended prep school at St. Paul's School in Concord, New Hampshire. He enrolled in the Harvard College class of 1885.

Question: what did he study at harvard
Self-contained rewrite: What did William Randolph Hearst study at Harvard University?