Fuse Fumble Final Fix
Success! Found the secondary panel (portside midships) hidden behind some carpeting, and with a handy fuse tester, located miscreant 10A. Replaced same and we are illuminated once more. Thank you Both Gentlemen for your good ideas and patience. Perhaps in the future, I will be able to 'pay it forward' and assist some other poor soul.
Best Regards, Fred L, Nova Scotia.