This is a 19th century hand embroidered handkerchief with a drawn thread work border. There are flower sprays with pansies to each corner.
This seems to have been made by Lady Lamb (nee Sabina Maissa). It came with a larger handerchief listed elsewhere on this website, and was included in the inventory that came with the collection.
Excellent unused conditition.
I will send a copy of the inventory to the buyer. There is a photograph of Lady Lamb in the NPG. https://www.npg.org.uk/collections/search/portrait/mw274008/Lady-Lamb