I have handled a very large number of Tansel powder horns over the years. The "left hand" and "right hand" carry horns are immediately obvious by the orientation of the central federal eagle. Of the early horns made in Kentucky, those by Francis Tansel are almost all right hand horns, both in physical characteristics and engraving. The early horns by son John seemed to follow the pattern, but as he got into the mid-1820s, he made a few left hand horns. They were physically a left hand horn and engraved to be worn as such. One interesting Tansel horn is the fine "Garret Wall" horn by Francis Tansel made for use in the War of 1812. It is a very large horn, heavily decorated, but has two eagles, one for a right hand carry, and the other positioned for a left hand carry. Apparently he was covering all bases on this large, almost storage sized, horn.
After the Tansels moved to Indiana, the sons John, Stark and Timothy continued to carve horns [father Francis stopped carving in the early 1820s], but the left hand/right hand issue slowly became less important. Early Indiana horns were generally right hand carry horns, with a couple of rare examples of left hand carry horns. But by the 1840s the Tansel sons had started using left hand horns at times and carving them for a right hand carry. Obviously, the horn had to be rotated 90+ degrees to make it work on the right side...and that's exactly what they did. Horns from 1844 and later seemed to still prefer right hand horns for right hand carry, but a significant number were left hand horns that were rotated and carved for right hand carry...as if the physical side of the cow's head didn't matter nearly as much any more. Left handed horns for left side carry were made, but not very often. The number of later left handed horns carved for a right hand carry is significant, and probably done when a good right hand horn wasn't immediately available. Shelby Gallien