in 1906. According to the Frans Hals catalogue raisonné, 1974, 222 known paintings can be ascribed to Hals. This list was compiled by Seymour Slive in 1970−1974 who also wrote an exhibition catalogue in 1989 and produced an update to his catalogue raisonné work in 2014. In 1989, another authority on Hals, Claus Grimm, disagreed with Slive and published a shorter œuvre of 145 paintings in his Frans Hals. Das Gesamtwerk. It is not known whether Hals ever painted landscapes, still lifes or narrative pieces, but it is unlikely. His debut for Haarlem society in 1616 with his large group portrait for the St George militia shows all three disciplines, but if that painting was his signboard for future commissions, it seems he was subsequently only hired for portraits. Many artists in the 17th century in Holland opted to specialise, and Hals also appears to have been a pure portrait specialist. Painting technique Hals was a master of a technique that utilized something previously seen as a flaw in painting, the visible brushstroke. The soft curling lines of Hals's brush are always clear upon the surface: "materially just lying there, flat, while conjuring substance and space in the eye." In this way his style was similar to Édouard Manet; in fact, Hals was described by author Raymond Cogniat as "the Manet of his day." Lively and exciting, the technique can appear "ostensibly slapdash" – people often think that Hals 'threw' his works 'in one toss' (aus einem Guss) onto the canvas. This impression is not correct. Hals did occasionally paint without underdrawings or underpainting (alla prima), but most of the works were created in successive layers, as was customary at that time. Sometimes a drawing was made with chalk or paint on top of a grey or pink undercoat, and was then more or less filled in, in stages. It does seem that Hals usually applied his underpainting very loosely: he was a virtuoso from the beginning. This applies, of course, particularly to his genre works and his somewhat later, mature works. Hals displayed tremendous daring, great courage and virtuosity, and had a great capacity to pull back his hands from the canvas, or panel, at the moment of the most telling statement. He didn't 'paint them to death', as many of his contemporaries did, in their great accuracy and diligence whether requested by their clients or not. In the