U. S. Grant Document Signed as President 作为总统的部分打印牛皮纸 DS，一页，15.5 x 19.5，1876 年 8 月 15 日。格兰特总统任命约瑟夫-波特（Joseph B. Porter）为 "海军外科医生......海军中校级别，拥有法律规定的相关军衔"。尤利西斯-S-格兰特总统在最后用墨水整齐地签名，海军代理部长丹尼尔-安门（Daniel Ammen）会签。底部的蓝色印章基本完好。状况良好，折痕交错，墨迹粘连处略有不规则。

Composed of several subsidiaries, the Drouot Group is a major player in the art market. Hôtel Drouot, located in the heart of Paris, has been the world's largest public auction center since 1852. 15 salerooms are available to more than 70 auction houses. The emulation generated by an annual offer of 230,000 artworks from 21 major specialities - from Antiquity to street art - attracts some 3,000 visitors every day. The Group's digital platform, Drouot.com, offers digital sales - Live auctions (live broadcasting and participation in auctions), Online-only auctions (dematerialised auctions) and Buy Now sales (sales of lots at fixed prices). Nearly 2 million items are offered annually by 600 auction houses. Auction news is reported every week in La Gazette Drouot, the leading weekly magazine for the art market and culture published by Auctionspress.