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Books about Mantelle:
L'Olympe est-il sur la terre. Rondeau. (Les paroles de M. Mantelle, etc.) by Joseph Legros (1767)
Wiki information Mantelle:
A mantelletta, Italian diminutive of Latin mantellum 'mantle', is a sleeveless, knee-length, vest-like garment, open in front, with slits instead of sleeves on the sides, fastened at the neck, once even more common than the mozzetta.