https://trc-images.nl/collection_images/hires/2018/2018.0109.JPG#\\TRC-SERVER\TRCSharedWork\TRC Database\collection%20photographs\2018.0100\2018.0109.JPG#
It is likely that this is a mourning veil that was originally draped over or attached to a woman's hat.
https://trc-images.nl/collection_images/hires/2018/2018.0109_2.JPG#\\TRC-SERVER\TRCSharedWork\TRC Database\collection%20photographs\2018.0100\2018.0109_2.JPG#
Complete panel of black net lace with a ground design of sprigs stylised flowers and leaves and a border design of connecting stylised flowers and leaves. The lower edge is scalloped.