"I hid my copious material after opening the Vault those five long years ago. In a fit of spastic paranoia, I did not write down the locations to the information. Find it for me and be handsomely... Oh, were you expecting me to say "handsomely rewarded?"
Pick up Tannis's ECHOs: 0/5
"Years ago, Handsome Jack tortured Patricia Tannis and stole the Vault Key from her. Tannis, for some reason, wants you to find her missing journals wherein she chronicles what Jack and his men did to her."
Collecting the ECHO recordings from around Sanctuary is a straight forward process of following the mission markers and selecting the mission items when they are located.
"Tannis has received the chronicles of her torture, and all is right with the world."