Note 1 at Acts 10:9: The journey from Caesarea to Joppa was about 35 miles, more than one day's travel. Cornelius' servants evidently left the next day and arrived at Simon's house around noon two days after Cornelius had seen the angel. When Peter left with the messengers, they departed on the third day after the vision and arrived at Cornelius' house about 3:00 p.m. on the fourth day (v. 30)

Note 2 at Acts 10:9: It was customary for houses of this time to have flat roofs with outside stairways and the people would often use them to relax or pray.