Conversation so far:
What did Benjamin Henry Latrobe do in england?
Latrobe returned to England in 1784, and was apprenticed to John Smeaton, an engineer known for designing Eddystone Lighthouse.
What is going on in life?
Then in 1787 or 1788, he worked in the office of neoclassical architect Samuel Pepys Cockerell for a brief time.
What did he try next?
In 1790, Latrobe was appointed Surveyor of the Public Offices in London, and established his own private practice in 1791.

Question: What did they try next?
Self-contained rewrite: What did Benjamin Henry Latrobe try next?