what makes Gulliver leave house

Gulliver had always intended to travel and attended his studies with the intent to do just that. When he was done with school he received an offer to work as a ship's surgeon (under his master, Mr. Bates) which he promptly accepted. After his return, three and a half years later, he set up a practice with Mr. Bates, settled in London and got married. When Mr. Bates died, the business began to fail, and Gulliver decided he wanted to go back to sea as a surgeon.