Our special collections library assistant came across a set of 20 maps titled Carte Topographique d'Allemagne by Jaeger dated 1789.
I found this reference to them http://www.oldmapsonline.org/map/cuni/856224 but it does not tell us how many maps are in this set.
Does anyone have more details for us to go by?

Cheryl Woods
Map Librarian
Western University
London, Canada