According to her article in thepeerage, “ ...She married William John Monson, 6th Baron Monson of Burton, son of Colonel Hon. William Monson and Anne Debonnaire, on 8 May 1828..."
From fashionablylateagain.blogspot.com/2012/09/the-wedding-dress-200-years-of-wedding.html
This dress starts the de rigueur epaulettes at the shoulders, they taper to narrows marked by bows, then widen to a pair of aprons.
Keywords: 1828, Eliza Monson, Lady Monson of Burton, Larken family, Monson family, Baroness, British, epaulettes-apron, lace ruffles, bows, high neckline, fitted bodice, vee neckline, pleated bertha, long close upper puffed sleeves, contrasting cuffs, vee waistline, maxi-length close skirt