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.
V&A joins Google's virtual fashion exhibition 'We wear culture
Chapter 13 - The Bustle Period and the Nineties (ca. 1870-1890s).pdf
Modern search results
silhouette Atelier Nostalgia
Fashion – 5-Minute History
Place de Meir at Antwerp - Great Art Library - Paintings & Prints, People & Figures, Other People & Figures, Other - ArtPal
Elegant Satin and Lace Corset from The Metropolitan Museum of Art
Retro Rack
Striped Silk Dress with Lace Bodice, ca. 1890s
Corset cover, French