The Revised Standard Version is an English translation of the Bible published in 1952 by the Division of Christian Education of the National Council of the Churches of Christ in the USA. You will find a new line of illustration in this Bible by Horace Knowles. Instead of the usual type of story-picture there are simple little drawings that look more like up-to-date visual aids than illustrations. That is indeed what they are; and they have been fitted into the text just at the place where help is needed.
There are, for example, many little route-maps. The Bible is a great Travel Book, and where so many journeys are made a map is essential. But a general map is often more difficult to read than a page of type. What is wanted for easy reference is a simplified map, or many such maps, each showing only the places mentioned in the text, and if possible also the route taken by the person concerned. To know the distance between the different places would be an advantage. In some cases it adds to the point of the story. So, along with the maps, drawings of milestones have been inserted to give this information.
