Focus on Saint Matthew and the Angel and explore the Comparison.
The comparison is not perfect because the only images available of the lost Saint Matthew and the Angel are black and white  photographs that were taken before World War II.  The lost painting showed Saint Matthew as poorly groomed, with dirty feet. Although this was the style of Caravaggio, the church leaders thought it was too crude and did not want to have what looked like a peasant hanging in their sacred altarpiece. In addition, they thought that this Matthew did not match the other two paintings that Caravaggio had already done. It was apparently disconnected and therefore had no place with the others. The second piece keeps true to the same subject, but with a few changes. Matthew looks more like the other two Matthews in the altar. The Saint is now more serious and in control in the presence of the angel. Instead of being fully controlled by the angel, Saint Matthew is only encouraged by the angel in the second one. He is working more on his own accord. Nevertheless, the surviving version loses the touching directness of the first - the childlike angel patiently guiding the Saint's hand on the page as though he were the child.
Saint Matthew Angel Caravaggio angel World War II