And Gary gets it!
Yep, it's a Westland Lysander, used for Air Observation, Air Sea rescue, and ground attack (!), but best known for its role with S.O.E., dropping and picking up agents and Resistance members from enemy-occupied countries.
Good grief! He's got it again!
Yep, the porthole just forward of the wing leading edge, port side, on a Sunderland flying boat.
Now who's going to post another pic?
I will get some pics this summer. I am trying to talk the wife into going to Chicago to see the JU-87 they got up there. But I will see what I can find more local. There has to be a Texan or Gooney bird around here somewhere.
Sounds good - especially with those two clues!
Meanwhile, another easy one to be going on with, until Gary gets some more, or someone gets this one and posts a pic.