Henderson forced Bartosz Bialkowski into a fine save before Rickie Lambert headed home Dan Harding's cross.
BBC: Sport - Millwall 1-1 Southampton
2.
Limardo won the men's individual epee late on Wednesday, beating Norwegian Bartosz Piasecki 15-10 to earn Venezuela only its second Olympic gold medal in history.
BBC: Fencing gold medal winner Limardo takes public transport