1895-1900 French corset cover (Metropolitan Museum of Art - New York City, New York USA), Grand Ladies

This shows one way of providing a modesty piece that peeks out above the neckline of a bodice and presentable under-garments wherever a bodice or sleeves have openings.

LIVING THE AVANT-GARDE: THE TRITON COLLECTION FOUNDATION

PDF) Iskin, Art Nouveau and the New Woman: Style, Ambiguity and

Vogue prints hi-res stock photography and images - Alamy

Fashion – 5-Minute History

Death Becomes Her: Mourning Attire at the Met Exhibits Widows

Fashion – 5-Minute History

Corset cover, American

Corset cover, French

Corset, French