Browne was born at Bray, in Berkshire. She was a younger sister of poet Felicia Hemans. She began publishing poetry in 1826 in the Berkshire Chronicle, whose editor encouraged her writing. She published her first collection the following year, at 15.
In 1842 she married James Gray, a nephew of biographer Thomas Hogg. Her last collection was issued as "Mrs. James Gray".
She died at her home in Cork of "heart spasms", aged 32.
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