Currently on offer at eBay is a livery button of a lady;
Quarterly 1st & 4th Argent two bars Gules within a bordure Sable (for Sibthorp) 2nd Or a bend Azure between three leopards’ faces Gules (for Waldo) 4th Gules a chevron Or between three eagles’ heads erased Argent (for Ellison)
My educated guess is that the button may have belonged to Mary Esther Sibthorp. She was the daughter of Humphrey Sibthorp and Susannah Ellison.
My thanks to Arthur Radburn over at the Heraldry Society of Scotland’s forum who tracked down the Ellison blazon.
Image courtesy of the vendor, jibajaba.