Misc: England's Stonehenge is ______ years older than Rome's Colosseum?

Questions

In 1787 Thomas H. Gallaudet, pioneer of educating the---------- , born. ?

In 1822 Cesar ---------- (in Belgium), composer, born. ?

In 1824 George---------- , Scottish novelist (Lilith), born. ?

In 1830 Emily ---------- (in Amherst, Mass), poet, born. ?

In 1851 Melvil Dewey, created the Dewey ---------- System for libraries ?