The security, named Timberwolf I, a collateralized debt obligation of other collateralized debt obligations that were based not on actual home mortgage bonds but instead on those bonds' movements, was referenced in a June 22, 2007, email from a Goldman senior executive, Tom Montag, to another, Dan Sparks. Sparks is testifying today before Levin's panel.
http://www.huffingtonpost.com/2010/04/27/goldman-sachs-hearings-li_n_553318.html#s85332