Two mourning rings, 19th century

Two mourning rings, 19th century, comprising: one ring centring on a cluster of half seed pearls and a cushion-shaped diamond, the shoulders with a floral design, applied with black and white enamel, the reverse with a glazed compartment containing hairwork, size M, British hallmark for 18ct gold, date letter for 1840; and mourning ring centring on a glazed panel of hairwork, within an engraved gold mount of scrolled design, size N