Cast in Time

An Engineer finds himself in an Alternate reality, Cornwall, in the year 715 A.D. He awakens in the body of a young Baron.
Retired Lieutenant General, former head of the Army Corp of Engineers, lies dying at the age of ninety-two. Leading a full life, he is a decorated veteran of World War II, Korea, and Viet Nam.
His love of Engineering has him taking university courses his entire life. When his health falters, and he can no longer continue his education, MIT awards him an honorary Ph.D. in Professional Studenting.
After a long illness, he lies dying. His last thought is, "What a waste of such wonderful knowledge."
As he fades to black, the fun begins. He is to build a modern civilization without being burned as a witch!