Imitation is the sincerest form of flattery

What is the origin of 'Imitation is the sincerest form of flattery'?

Imitation is the sincerest flattery. Charles Caleb Colton (1780-1832). From "Lacon," (1820-22) Vol. 1, No. 183. According to Bartlett's.

Correction: Oxford Dictionary of Quotations.