Arthur K. Wheelock Jr., curator, northern baroque paintings, National Gallery of Art, Washington; Kenneth Slowik, artistic director, Smithsonian Chamber Music Society, and curator of musical instruments, Smithsonian Institution. Dutch artist Judith Leyster's 400th birthday is celebrated at the Gallery with an exhibition of 10 of her most engaging paintings, joined by some 20 paintings, works on paper, and musical instruments of the period. In the fourth podcast produced on the occasion of the exhibition, Wheelock talks to Ken Slowik about Leyster's love of music, the instruments she depicted, and various musical compositions of the age.