I've said it before: if you like old bicycles: visit the Velorama museum in Nijmegen, Netherlands.
No other museum will show you (when they're all at home) the famous three of the first makes of the safety bicycle that were introduced among the same lines in 1885: the Rover, the BSA and the Humber. Only the Rover was commercially succesful.
All four had the rear wheel chain drive which gave it safety. They were called 'dwarf safeties', since a safety bicycle in 1885 was a high wheel safety, like a Kangaroo or Xtra ordinary.
This late 1885 (or early 1886) Humber is in the Nijmegen collection.
In my photostream (click picture) I added two illustrations. One shows the very first model Humber safety. I am not sure if there are any survivors. The second illustration dates from december 1885 and shows the Velorama bicycle, although there's are small difference at the fork crown.
The owner of the Velorama museum told me the bicycle's got really bad steering characteristics. That's why the steering column has a self-centering mechanism. When you steer, the whole bicycle is lifted. Thomas Humber developed the concept over the years (here's the 1887-model) and in 1890 he was the first to introduce the final diamond frame with straight seat bar, still in use today.
Click the picture to see more pics on my Flickr site.