American social worker and journalist whose energies in the latter half of her life focused on securing the welfare of blind infants and children.

Cynthia Westover was reared largely by her father, a geologist, in western mining camps, and she could shoot a rifle and ride a horse at an early age. After completing a teaching degree at the University of Colorado, she made her way in 1882 to New York City to seek a career as an opera singer. Failing at that, she won appointment as a U.S. customs inspector in 1887, and in 1890 she became secretary to the New York City commissioner of street cleaning. In the latter capacity she invented and patented an improved street cleaner's handcart and a self-emptying dump cart. During this period she also wrote, with C.F. Ober, the book Manhattan, Historic and Artistic (1892). In 1894 she secured a position as editor of the women's department of the New York Recorder. Her second book, Bushy, or Child Life in the Far West (1896), was based on her own early life.

She married John Alden, later editor of the Brooklyn Eagle, in 1896, and about that time she began sending Christmas cards to shut-ins. A group of fellow journalists then organized themselves as the Sunshine Society to carry on and enlarge the scope of the practice. Alden spread the word through her Recorder column and continued her involvement when she moved to the New York Tribune in 1897 and to the Ladies Home Journal in 1899.

The International Sunshine Society, incorporated in 1900, was headed by Alden for the rest of her life. In 1902 the society established a sanatorium in Bensonhurst for blind children (in 1917 it became Harbor Hospital), and in 1905 a nursery and a kindergarten for blind children were established in Brooklyn. In 1910 the Sunshine Arthur Home for blind babies was established in Summit, New Jersey, and over a period of years the society's efforts led to legislation providing care for blind infants and children in 18 states. Alden's other books include Women's Ways of Earning Money (1904) and The Baby Blind (1915). By the time of her death the International Sunshine Society had 500 local branches in 38 states as well as branches in 8 foreign nations.