Antique Framed Oil on Canvas portrait of a woman painting 1809

I Purchased this and several other beautiful oil paintings at a government seized auction called The Rosemont Inn Mansion, Bed and Breakfast, Vevay, IN.  The Rosemont Inn is a beautifully restored 1881 brick mansion constructed with the finest examples
of Indiana native hardwood craftsmanship. It had many fine Art, Antiques, collectibles:  furnishings.  Various works of fine art including many original oil paintings, “Portrait Of A Woman“, “Atmospheric Beauty” by Jules Mersfeder, other
artists include P. Sanchez, Henry L. Richler, J. Mark, S. Suburger, and many others. The Inn houses a collection of 18th and 19th century museum quality artwork consisting of landscapes and early American portraits.

The frame size of  this painting is 30-1/4x34x4. The picture size itself is 24x28. There is a signature on the front top left corner but can't make out what it is, something like R or K .  then J or I and possibly something like Lang, RJ Lang, or KJ Lang, really not sure. The back reads Jane Gardner born August 28, 1809.

Fair