He's her dressmaker. Actually, I believe there was a rather famous designer named Molyneux (sp) back then so maybe that's who it is. She did seem rather chuffed and I'm not sure she would have been if it were just her regular dressmaker.
How did I miss this information? In the Highclere Castle (aka Downton Abbey)ancestry Henry Howard Molyneux Herbert was appointed Earl (Gov.)
of Carnarvon Castle in1854. Any connection?