Clue 1: I was born in 1857. I was a librarian in Washington County, Maryland.
Clue 2: In April 1905, I started the nation's first bookmobile. The horse-drawn buggy carried books to people in the rural areas of Maryland.
Clue 3: I died in 1931. Today, there are more than 800 bookmobiles across the country.
Who am I? _________________