The term 'I, To Claudius' can be broken down into three crossword solutions: Unum (4 letters), EGO (3 letters), and ONE (3 letters). Unum is Latin for 'ONE, ' and is often used to refer to the concept of unity or oneness. EGO is a Latin word meaning 'I' or 'ME, ' and is often used to refer to the self or individual identity. Finally, ONE is a number that refers to the concept of singularity or uniqueness. Together, these three words form the phrase 'I, To Claudius, ' which is a reference to a famous line from William Shakespeare's play Hamlet. In the play, the character Claudius is addressed by the protagonist, Hamlet, who says 'I, To Claudius.' This line is often interpreted as a declaration of Hamlet's own identity and purpose.