The only person I know of who has done that is Rick Kent, an extraordinary climber, known for very long multi-peak day hikes. I believe he has climbed down from Mt Russell, and up the north slope of Mt Whitney at least once, maybe more.

Searching for: "Rick Kent" whitney russell
will turn up some hits.

Here is a picture of his from his album: Mount Hale & Mount Young - 8/28/2005

Caption: North slope/face of Mount Whitney (as seen from Mount Hale)

Click for the full-size image.

Somewhere, he has posted a view of Whitney's north slope from Mt Russell, with a line showing his route to the summit of Mt Whitney.