Artist’s Sig Help: Moreau?

Pastel of Secretariat, signed by whom? I looked at askart’s Moreau section without luck. Any suggestions? TIA!

 

My guess is "adept fan"

 

So, which came first?......the chicken or the egg...............................?

So June 11, 1973 is the TIME issue and the date of the race was.......
June 9, 1973.........probably doesn't help much......since the art was only signed 1973........

 

Or the postage stamp?
Oh, not this, commemorative from 1999.

 

yes fan art

 

So INTERESTING! Good advice. Thank you all!