Yes Harriet did complete her quest to free the slaves from their masters.
yes
do make every one happy
Historians judge her impact on the quest for freedom as huge; she had a huge impact on the quest for freedom. Harriet rescued many people and inspired others to do the same.
Yes, the quest must be completed up to a certain point
The Quest for Freedom
After getting dragon marshal quest completed
After you have completed the 'demon slayer' quest you get it as a reward. >.<
Jubal's Healing Liniment quest must be completed before attempting Jubal's Puzzle of the Scraps quest
You must have completed the previous quest, Jars of Slime, to unlock Sneevil Boxes.
To get into Nidavellir, you must be at least level 40 and have completed the prior quest. You will get the quest The King and I by Bjorn Ironclaws. After you complete you will get the quest for Nidavellir. Hope this helps.
'Dark Brotherhood Forever' is a series of radiant missions, the game will create a new target for you for each assassination. As it's a radiant quest, it has no end, so the quest can't be fully 'completed' as such.
Once you have achieved a level of completed quest, you will be admitted into the champion's guild. Only then it could be unlocked in the guild.