Tas Tee's Firefly. The Morgan Horse Magazine, August 1971

https://www.allbreedpedigree.com/tas-tees+firefly

Sired by the Merle Evans bred O C R, and out of Gayla whose sire was bred by the L U Sheep Co, WY, and whose dam was by Flyhawk, he sired 89 registered get, most of whom carried the Shaker prefix.