Whenhebecameprimeministertheminewasalreadylaid,andtotheendofhisdaysMr.Balfourapparentlyneverrealizedthatitwasthemineofwhichallaretodayaware.
What's a sentence that uses these characters?
When he became prime minister the mine was already laid, and to the end of his days Mr. Balfour apparently never realized that it was the mine of which all are today aware.