This was what persuaded me, China:
Another description from The Pall Mall Gazette, Jan 26 1899
The Hon Margaret Georgina Curzon....The bride .... wore a very handsome gown of ivory-white satin, made with Court train, and embroidered in a Louis XV bow design, carried out in fine silver paillettes and diamonds. The bodice was arranged with a yoke of tucked white chiffon and a pretty trimming of orange blossom, while the collar and the long transparent sleeves were of lovely old Carrickmacross lace, and she wore a coronet of orange blossom, a diamond pendant... and a pearl and diamond brooch....She carried a very lovely bouquet of white roses, stephanotis, organge blossom and lilies of the valley...
Neither of the other two mentioned the design on the dress or the transparent/lace sleeves.