The legend reads
Cortelyou, Knox, Payne, Moody, Hay, Roosevelt, Hichcock, Root, Shaw, Wilson. The President reading his message to the Cabinet before sending it to Congress.
Update: Let me stress that the photo is a genuine 1903 print. I haven’t done anything to it myself, and I doubt the Library of Congress did. But clearly the original publisher optically printed in several of the figures.