Now there’s a cut of meat you don’t encounter everyday. I know what my guess for it was, but I am apparently wrong, and am still in the dark no thanks to Google. (Shocking! yes). They appear to be an ingredient in Haggis and in medicinal concoctions, can be cooked on a skewer, make good decoys for birds when thrown on the water, and the term appears in histories of the Battalion.

If I were to guess by an 1895 book “Object Lessons for Infants,” sheep’s lights must be lungs; indeed, some enterprising soul (ha ha) incorporated that into a Star Trek fanfic story, and thus via Dr. McCoy I finally get an answer to my question:

“Then the landlord gave Bones a copy of the inn’s menu.

“Deep-fried herring and oatmeal,” he read, puzzling out the weird spellings they used to use. “Cock-a-leekie soup. Cullen skink. Clootie dumpling. Spotted dick. Pork pies. Jellied eels. Blood pudding. Faggots in gravy. Sheep’s lights — what are they?”

“Lungs,” said the landlord, looking at us as if we were hicks from the outback of the Benecia Colony.”

(Dialog found here: http://www.squidoo.com/EMDS-32-k4)