I'm using ArcGIS 10.2 Desktop on a Windows platform.
I have georeferenced about a dozen USGS topographic raster maps from around 1900. Each georeferenced map is an now an .mxd file. To the best of my limited knowledge there are no layers associated with any of these maps.
I would like to tile these into a single map [to which multiple layers would be added] but cannot find a way to do this. Perhaps I need to start over using a different technique?
Would be VERY grateful for any suggestions on how to solve this problem.