In Camus' The Plague one of the main characters is struggling over the first line of his book. This is the line:

"One fine morning in the month of May an elegant young horsewoman might have been seen riding a handsome sorrel mare along the flowery avenues of the Bois de Boulogne"

I think at some point he changes it to "brown, sorrel mare" and he dismisses it as redundant. This fits tsuwm's suggestion, unless sorel and sorrel are different words.