Identify A Registration Number On A 19th Century Vuitton Trunk

I am a volunteer at Sonnenberg Gardens State Historic Park, a 19th century Victorian estate once owned by Mr. and Mrs. Frederick Thompson. We have acquired the trunk owned by Mrs. Mary Clark Thompson of NYC which we believe is from the late 1890's. It has a large sticker inside with your label and a registration number. I would like to be put in contact with your Archives/History Department to perhaps get further information on this trunk. Your customer service phone number does not work. Kathleen Linse