Complex sentence: New York erupted for four continuous days and nights of celebration, and when he departed for what he thought would be a restful trip to Boston, found the route lined by cheering citizens, with welcomes organized in every town along the way.
Split into simpler sentences: New York erupted for four continuous days and nights of celebration. When he departed for what he thought would be a restful trip to Boston, he instead found the route lined by cheering citizens, with welcomes organized in every town along the way.