Cyrus Cobb and his twin brother Darius had a lifelong association in art. They began drawing at an early age and became accomplished painters. Cyrus often worked on large projects such as a painting for the Tuileries Apartment Hotel on Commonwealth Avenue in Boston, but he was primarily a sculptor, while Darius was best known for his landscapes and portraits. Cyrus Cobb's bust of Samuel Francis Smith, commissioned by the Commonwealth of Massachusetts, now stands in the Senate Chamber in the Massachusetts State House. Newton resident Samuel Francis Smith is remembered as the author of the song "America."
Cyrus' plaque, The Child's Symphony, included in the exhibition, was reproduced in plaster casts and given away as a marketing incentive by a local tea company.