Who said "The greatest monument we can leave is a freer nation."?

This quote is attributed to John Brown.

The greatest monument we can leave is a freer nation. - John Brown

"The greatest monument we can leave is a freer nation."

John Brown

Abolitionist, Militant American 1800–1859

"I John Brown am now quite certain that the crimes of this guilty land will never be purged away but with blood."

"Let us do our duty."

"The Bible is the word of God and is to be obeyed."

"I am here to lay down my life for the cause of justice."