I have a world map of about 1832 (I think) which shows the middle of Africa largely unexplored. If you want, I will scan it and send it to you, as best I can. It's longer than A4, but being a British map, that section (which includes Africa) is in the middle. I also have a similar period one of Africa itself, and I will happily scan that too.

For good paper maps, I can recognise the Michelin road maps. They got us from South Africa to Europe. The N. African Sahara one/s even have wells marked, their depth, and whether or not the water is drinkable.

Okay, they are from the Western point of view, but if they will help at all, you are most welcome.

Andrea