i want to introduce everybody to a remarkable photographic à that is francis miller's photographic historyof the civil war. a 10 volume magnificent piece of work. it was created about the time of Ãthe civil war between early 1900s and 1911. so this is created and miller sent out research for all of these lost photographs about the civil war. there is one volume that is particularly interesting. for someone who is interested in engineering. it is volume 5. artillery which also Ãdid you find illustrated history, photographic histories, photographs of engineering projects useful in research of this book? >> yes. first of all because they reinforce some of the things that i was reading. they also provided me with in some cases, an image that i had to try to imagine through text. case in point i will give you would be herman Ãso he is a west pointer engineer, the youngest man to graduate from west point. he graduates from west point, he is 19 years old. goes into the railroad business. he is a remarkable engineer. and he is brought on to be one of the chief engineers of the newly formed united