In 1818 Field revisited Moscow on business, prompted by his collaboration with the publisher Wenzel. He and his wife gave a series of concerts in the city in 1821, the last of which marked their last appearance in public together. Adelaide left Field soon afterward (taking Adrien with her) and attempted a solo career, which was not particularly successful. Field stayed in Moscow and continued performing and publishing his music. In 1822 he met Johann Nepomuk Hummel; the two collaborated on a performance of Hummel's Sonata for Piano 4-Hands, Op. 92.