In article ,
says...
http://marsrovers.jpl.nasa.gov/mission/status.html

SPIRIT UPDATE: Back to the Ol' Grind - sol 57, Mar 01, 2004

During its 57th sol on Mars, ending at 7:12 PST on March 1, Spirit observed
the area on "Humphrey" that was thrice brushed by the rock abrasion tool.
An area just to the right of the brushed area, where the team intends to
grind, was also examined.

OK -- well, there ya go. Better late than never. I just thought it was
weird that this image popped up and there was NO info on the website
about the RAT having been used, period...

In any case, I'll take the Emily Latella route and say "Never mind"...

Doug