Number 19 is an imaginative way to review all twenty-four major and minor keys, without playing a single scale. Campagnoli packed theory and bow technique into this caprice: he cycles through the entire circle of fifths, in the major and minor variations of each key, throwing in a different bowing for each. The result is twenty-four mini caprices, each with its own character and style. Notice for instance, how G ( mm.5-6 ) major sounds jolly, A major ( 13-14 ) sounds slightly aggressive, and C-sharp minor ( 29-30 ) sounds mysterious. The hardest part of learning this caprice was discerning all the characters and attempting to convey them in performance. To accomplish this, I had to extract each 2-measure section and repeat it until I got the character I wanted. Much of the time, characters were determined by the bowing and shape of the line. For example, A-flat major ( mm. 33-34 ) is whimsical, because of the displaced arpeggios and lopsided bowing. B minor (43-44) is sneaky, w