#12 Left: Ferdinands brother Gustav Friederici, taken in Berlin, in the 1860's. A contemporary of Gustav is #13, and an older portrait is #10.

#14 Right: Possibly Ferdinand. The man is shown with a large ring on his left hand and sports the top hat worn by the American President at the time. A later portrait can be found on #15.

These two photos were taken by the same photographer in Berlin, probably the same day. Notice the same wooden prop both gentlemen rest their arm on. A contemporary photo of the man on the right is connected to Amalie, here he is connected to Gustav Friederici.