NOTE: Many old images including old maps are in the public domain because their copyrights have expired. This applies to the United States, Canada, the European Union and those countries with a copyright term of life of the author plus 70 years.
There are incredible old maps available in large download sizes on the internet. The maps make it easier to local counties, and to see distances between villages. They have been very helpful to us.
These are excellent sources for old maps of Hungary: http://hungary-maps.myhunet.com/en/
Really great, large old maps: http://lazarus.elte.hu/hun/maps/1910/vmlista.htm