Anagrams.

Dame Eleanor Davies (prophetess in the reign of Charles I.) = Never so mad a lady.

Gustavus = Augustus.

Horatio Nelson = Honor est a Nilo (made by Dr. Burney).

Queen Victoria’s Jubilee Year = I require love in a subject.

Quid est Veritas (John xviii. 38)? = Vir est qui adest.

Marie Touchet (mistress of Charles IX. of France = Je charme tout (made by Henri IV.).

Voltaire is an anagram of Arouet l(e)j(eune).

These are interchangeable words:—

Alcuinus and Calvinus; Amor and Roma; Eros and Rose; Evil and Live; and many more.