Love is an obvious subject for the sentimental image. Rejection and disappointed love, especially that experienced by women, were themes that tugged at the heart-strings, and many of the artists were women themselves. Love was also exploited by the burgeoning trade in valentine cards and music sheet covers. Feelings could be easily represented through popular signs and symbols. The motif of the letter, the language of flowers, and the power of the downcast eye lent images an element of intrigue and mystery.