In recognition of that hallmark, I share a poem written by Charlotte Perkins Gilman. The book was titled Suffrage Songs and Verses and sold for 10¢ a copy.
LOCKED INSIDEShe beats upon her bolted door,
With faint weak hands;
Drearily walks the narrow floor;
Sullenly sits, blank walls before;
Despairing stands. Life calls her, Duty, Pleasure, Gain–
Her dreams respond;
But the blank daylights wax and wane,
Dull peace, sharp agony, slow pain–
No hope beyond.
Till she comes a thought! She lifts her head,
The world grows wide!
A voice–as if clear words were said–
"Your door, O long imprisonéd,
Is locked inside!"