More on Knights of the Green Cloth from Infoplease:

• Knights of the Green Cloth - Knights of the Green Cloth Same as CARPET KNIGHTS (q.v.). Source: Dictionary of Phrase and Fable, ...
• Carpet Knight - Carpet Knight One dubbed at Court by favour, not having won his spurs by military service in the ...
• Dictionary of Phrase and Fable: K - Definitions, origins, and illustrative excerpts for words, phases, and literary allusions starting with "K"