(en-US) « Berlin's Royal Wedding; the Red Prince's Only Son's Interesting Alliance. Further Evidence That the Schleswig-Holstein Sore Is Healed--the Curious Torchlight Dance. », The New York Times, (ISSN0362-4331, lire en ligne, consulté le )
(en-US) « THE EMPEROR EXHIBITS TEMPER; Prince Frederick Leopold Imprisoned for Two Weeks as the Result of a Quarrel with Wilhelm. », The New York Times, (ISSN0362-4331, lire en ligne, consulté le )
nytimes.com
(en-US) « Berlin's Royal Wedding; the Red Prince's Only Son's Interesting Alliance. Further Evidence That the Schleswig-Holstein Sore Is Healed--the Curious Torchlight Dance. », The New York Times, (ISSN0362-4331, lire en ligne, consulté le )
(en-US) « THE EMPEROR EXHIBITS TEMPER; Prince Frederick Leopold Imprisoned for Two Weeks as the Result of a Quarrel with Wilhelm. », The New York Times, (ISSN0362-4331, lire en ligne, consulté le )