sentences:  There are 530 letters kept in a private archive in Italy as evidence of that relation.In 1958 Princess Charlotte Agnes of Saxe-Altenburg also visited Marga Boodts, together with her brother Prince Frederick Ernst of Saxe-Altenburg.Prince Sigismund and Princess Charlotte both provided affidavits that the woman living at Lake Como was indeed Grand Duchess Olga Nikolaevna of Russia.