"played like a fiddle" and "yours truly" origins

Posted by Michael A. Jundi on January 14, 2003

Two real problem origins for me, can someone help? I'm a librarian in Ohio, USA in a High School and cannot find an answer to either of these phrases.

Played like a fiddle-meaning to be manipulated artfully.

Yours truly-as in the sign off of a letter.

When/where did this begin in our language???