This dissertation presents a performance guide of two solos for early valved trumpet, as well as an appraisal of their historical significance. The first of these solos is F. G. A. Dauverné's Variations pour trompette à pistons avec accompagnement de Piano-forte, op. 3 (1833). The second solo examined is Amilcare Ponchielli's Concerto per Tromba e Banda, op. 123 (1866). Although Ponchielli's work dates from only the middle of the century, by time of its composition the valved trumpet had already been developed enough to have attained true artistic value. This dissertation provides evidence concerning the evolution of nineteenth solo literature for the Romantic trumpet by means of formal analysis in regard to form, harmony, and historical performance practice.