From: THE AMUSEMENTS OF NEW ORLEANS. By B. E. Forman Jr. [From: Standard History of New Orleans, Louisiana] Edited by Henry Rightor, The Lewis Publishing Company, Chicago, 1900:
"The sportsmen's stores in New Orleans keep in stock all sorts of rods and tackle and flies, where fishermen's outfits and paraphernalia can be had, and the trade is very considerable, as many men in New Orleans are enthusiastic fishermen, and some of them very expert. Green trout are usually caught with live bait, shrimp being used, though some believe in a bit of red flannel to attract the trout. There is always doubt about the red flannel, but it is supposed to appeal to the picturesque taste of the fish. There is no doubt about the shrimp. They will bite at shrimp, and the Radian fishermen, who are always experts in all sorts of fishing, always employ shrimp."
This is, to me anyway, an interesting bit of fishing and New Orleans history. Live shrimp is an unusual bait for green trout (LM bass), but perhaps not in southern Louisiana, where bass are quite tolerant of mild salinity. I personally have cought largemouth bass in the Gulf of Mexico at the Mississippi river delta, where one cast lands a bass, the next might catch a flounder or a red drum. The bit of red flannel is analogous to the red plastic beads sometimes used today. Apparently, it appeals to their "picturesque taste!" So, anyway, who are the "Radian fishermen?" Would love to know! Cajun? Perhaps one of you guys can figure it out. (Google turned up nothing so far on Radians.)
PS: "Radian" is a misspelling of "Cadian," which is a once common misspelling of "Acadian," which then became "Cadjian" and is now the misspelled and mispronounced (but currently accepted) "Cajun."