Ok, fine, I succombed to Siesta and took the Metro back to the Hotel.
After Siesta, I journeyed out again, this time on search of Caravaggio's, wishing for more luck that pilgrimage churches.
First stop: Santa Maria del Populo, which was a rather short walk from the hotel. Alas, I found what I thought was the right Church, turns out there are two of the same name, or that it is a 'split church,' only Romans would think this a good idea! I was in, what I would learn, is the wrong one! To find the paintings of the martyrdom of St. Peter and the calling of St. Paul, go to Piazza del Populo, on the north end of the old city, the two Churches at the north end of the square, and they are in the one closest to the River Tiber. Now I know.....
Not to be totally thwarted, I did find the Madonna with the Peasants at San Augustino's, which is a truly stunning work. Earlier in the week, we had visited Sante Luigi dei Francesca (St. Louis of France) and the Matthew Chapel to see his works there.
Back to the hotel for dinner and a sleep.