Misc: what famous racehorse is the grandfather of sea biscuit?

Questions

Francisco Jose de Goya, artist, born.?

Dr C. Long first used ether as an anesthetic during a minor operation.?

Vincent Van Gogh, artist who always lent an ear, born.?

Hyman L. Lipman of Philadelphia patented a pencil with an attached eraser.?

U.S. 15th Amendment passes, guarantees right to vote regardless of race.?