W. R. Harper & H.C. Tolman

Map of the stronghold that the Aduatuci fortified against the Roman siege (Caesar's Gallic War 2.29). From William Rainey Harper and Herbert Cushing Tolman, Eight Books of Caesar’s Gallic War (New York: American Book Company, 1891), p. 135. 

Map of Gaul at the time of Caesar's consulship, showing locations of peoples and regions (Caesar's Gallic War 1.1). From William Rainey Harper and Herbert Cushing Tolman, Eight Books of Caesar’s Gallic War (New York: American Book Company, 1891), pp. 64-65.