Garrison, too, was impressed with Douglass, mentioning him in the Liberator. Several days later Douglass gave his speech at the Massachusetts Anti-Slavery Society's annual convention in Nantucket-- the speech described at the top of this page.
The abbreviation viz. (or viz without a full stop), short for the Latin videlicet, is used as a synonym for namely, that is to say, to wit, or as follows. It is typically used to introduce examples or further details to illustrate a point.
The adverb sic, usually enclosed in brackets, is a word editors use in the reproduction of someone else's speech or writing to indicate that an unexpected form exactly reproduces the original and is not a copier's mistake. Sic comes from Latin, in which it means so or thus.. Though it's a useful tool, some usage commentators feel it is bad manners to use a sic to needlessly call attention to someone's error or to deride the language of a less-educated person.