A pendant to this is a ring given either to Luther or his wife, as a memento of his marriage, by some friend. This is of the type of gimmal rings, divisible but not separable. On one hoop the setting is a diamond, on the other a ruby. The bezel separates into two halves when the ring is opened, and reveals on the two hidden sides the initials C V D and M L D, for Catharina von Bora and Martin Luther, Doctor. On the inner side of the conjoined hoops is the inscription: “_Was Got zusamen fiegt sol kein mensch scheiden_” (Those whom God hath joined, shall no man put asunder), in the old German spelling.[379] The diamond is on the Luther side of the divided bezel, and signifies power, durability and fidelity; the ruby on the side marked with the wife’s initials is taken to mean exalted love. Both this ring and the one already described are believed to have been designed by the artist, Lucas Cranach, who was a friend of Luther’s and assisted at his marriage. The ring is in the Grossherzogliches Museum at Brunswick. A very noteworthy ring, in the Waterton Collection at the Victoria and Albert Museum, London, belonged to Henry, Lord Darnley, and commemorated his marriage with Mary, Queen of Scots. On the bezel are the initials M H, entwined with a true-love knot, and within the hoop is engraved HENRI L. DARNLEY, and the date, 1565. Between the two groups of letters constituting the inscription, is figured a lion rampant on a carved shield. This ring is said to have been found in the ruins of Fotheringay Castle, where Mary Stuart was executed.[380] A peculiar class of rings bears the name of “gimmal rings.” This designation is derived from the Latin _gemelli_, “twins,” and indicates the form of the ornament. Two rings are joined together by a pivot so that when united they constitute a single ring, although they can be easily separated. On each circlet there is a band, so disposed that when both are brought together the hands are clasped and hold the separate rings in place. Occasionally, there are three or more rings combined in the same way, the designation “gimmal ring” being used for these also. The following lines by Herrick refer to this latter type: “Thou sent’st to me a true-love knot; but I Return a Ring of _jimmals_ to imply Thy love had one knot, mine a _triple_ tye.”