After Dagny Taggart crash-landed in the Valley, most people thought she was dead. Hank Rearden, Francisco d'Anconia, and others spent a lot of time frantically looking for the wreckage of her plane.
Francisco stopped in the Valley briefly to tell John Galt what had happened and what he was doing (at which point John showed him Dagny).
After realizing that she was alive, he asked John if they could send word that she was alive "in case anyone felt like I did" about Dagny's death (I don't have the exact quote in front of me).
I always assumed that he was referring to Hank Rearden, who he presumably knew by then loved Dagny. Was he also referring to Eddie Willars? Did he know that Eddie had feelings for Dagny too, or just that they had been friends for a long time? Who was Francisco referring to here?