Also, the Centennial Biographical History of Crawford County Ohio gives some background on Walter Scott Allen.
"Walter Allen was born in Boston, Massachusetts, about 1822, and he was nine years old when he started with his parents for the frontier. Upon reaching Baltimore both parents were taken ill and died there and [Walter Allen] was taken to the home of a wealthy tanner named McClelland, of Strasburg, Pennsylvania, while two other kind families furnished homes for the other two children, Benjamin and Priscilla. Mr. Allen never heard from either. He knew that his parents were people of means, but was never able to learn anything more of his family."