Doing a web search for the Daniel Chester French brought me to a list of Liberty Ships:

http://www.mariners-l.co.uk/LibShipsD.html

This was listed as part of her history: "6.3.44 Mined and sunk off Bizerta at 37.17N 10.22W"

For the SS McDonnell, I found the following American Merchant Ship list (and an image):

http://www.armed-guard.com/sunk.html

There is also a dedication page for one of the lost crew at:

http://www.armed-guard.com/ag74.html