Statistics for occurrence #1 of “Mrs. Sigourney” in chapter 2.20 of Cambridge History of American Literature: volume 2:

...who wrote for both sexes but rather for boys. Unlike the men, the women had already attained much contemporary fame. Mrs. Sarah J. Hale and Miss Eliza Leslie were popular magazinists and editors; Mrs. Sigourney was called the American Mrs. Hemans and read in every home; critics disputed whether our most important woman writer was Mrs. Child or Miss Sedgwick. The children's stories and verse of Mrs. Sigou...
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