It should be noted that the general confusion observable for many years in the estimation of Giorgione's work arose from the attribution to him of paintings executed in the comparatively broad manner of Titian, but which this artist did not adopt till Giorgione had been dead for a decade or more. The recent exhaustive critique of Lionelli Venturi[f] of the earlier master has cleared the air, and we now know the range of his work very positively. Giorgione was less fine in some of his paintings than in others, for he paid more attention to chiaroscuro as he matured, but there is no instance where he painted in the broader manner occasionally exhibited by Titian. All the works in the style of The Concert and The Three Ages are now known to be by other hands than those of Giorgione, and it must be unfortunately admitted that not a single painting by him exists either in England or America. [a] Vienna Gallery. [b] Cook Collection, London. [c] By Herbert Cook in _Giorgione_. [d] Uffizi Gallery, Florence. [e] The Brera, Milan. [f] _Giorgione e il Giorgionismo_, 1913. Note 52. Page 156 Hals is another artist as to whom many misconceptions have arisen in regard to his use of a very broad manner in his portraits. There is a total of about 350 works attributed to him, of which some two thirds are single portraits, and twenty are portrait groups. The balance includes over thirty genre pictures, mostly with single figures, and fifty heads of boys and girls generally shown in the act of laughing. It is in his genre work that the broad manner is mostly observable, and only very occasionally is it to be found in his portraits. In the more important works of the artist, even during his later period, his manner is by no means broad,[a] though it is not so fine as in his best years, say from 1635 to 1650. This estimate can however only be general, as his dated paintings of different periods after 1630 often correspond so closely that it is difficult to assign dates to the other pictures with certainty.