They arrived in New York City in May of that year and spent nine months traveling the United States, studying the prisons, and collecting information on American society, including its religious, political, and economic character.
那年五月他们到达纽约城并用了九个月游历美国，学习监狱制度，以及收集包括宗教、政治、经济在内的美国社会的各种信息。