The addition was the result of further reading he had done on slavery.

At around the same time, a dozen major books were published on American slavery.

"But you'll never be able to get a national referendum on slavery."

Lincoln's words on slavery are true and taken from the records.

A number of events continued to shape views on slavery.

In the past year, some 50 scholarly works on slavery have been published.

Adams and Rush were of the same mind on slavery.

We've got a very comprehensive civil rights collection, and we put together an entire section on Black slavery.

Many of his works were vivid and powerful attacks on slavery.

On the big issues, slavery and the Union, the South was wrong.