Mr Burnet has supplied a plate of the Monk flying from the scene of murder, in Titian's "Peter Martyr," showing how that great painter could occasionally adopt the style of Michael Angelo in his forms. In the same note he observes, that Sir Joshua had forgotten the detail of this picture, which detail is noticed and praised by Algarotti, for its minute discrimination of leaves and plants, "even to excite the admiration of a botanist."--Sir Joshua said they were not there. Mr Burnet examined the picture at Paris, and found, indeed, the detail, but adds, that "they are made out with the same hue as the general tint of the ground, which is a dull brown," an exemplification of the rule, "Ars est celare artem." Mr Burnet remarks, that there is the same minute detail in Titian's "Bacchus and Ariadne."--He is right--we have noticed it, and suspected that it had lost the glazing which had subdued it. As it is, however, it is not important. Mr Burnet is fearful lest the authority of Sir Joshua should induce a habit of generalizing too much. He expresses this fear in another note. He says, "the great eagerness to acquire what the poet calls 'That voluntary style, Which careless plays, and seems to mock at toil,' and which Reynolds describes as so captivating, has led many a student to commence his career at the wrong end. They ought to remember, that even Rubens founded this excellence upon years of laborious and careful study. His picture of himself and his first wife, though the size of life, exhibits all the detail and finish of Holbein." Sir Joshua nowhere recommends _careless_ style; on the contrary, he every where urges the student to laborious toil, in order that he may acquire that facility which Sir Joshua so justly calls captivating, and which afterwards Rubens himself did acquire, by studying it in the works of Titian and Paul Veronese; and singularly, in contradiction to his fears and all he would imply, Mr Burnet terminates his passage thus:--"Nor did he (Rubens) quit the dry manner of Otho Venius, till a contemplation of the works of Titian and Paul Veronese enabled him to display with rapidity those materials which industry had collected." It is strange to argue upon the abuse of a precept, by taking it at the wrong end. * * * * *