The Parisians, Book VI by Edward Bulwer-lytton

No satisfactory result attended the inquiries made at Munich save indeed this certainty, -- the certificates attesting the decease of some person calling herself Louise Duval had not been forged. They were indubitably genuine. A lady bearing that name had arrived at one of the principal hotels late in the evening, and had there taken handsome rooms. She was attended by no servant, but accompanied by a gentleman, who, however, left the hotel as soon as he had seen her lodged to her satisfaction. The books of the hotel still retained the entry of her name, -- Madame Duval, _Francaise rentiere_. On comparing the handwriting of this entry with the letter from Richard King's first wife, Graham found it to differ; but then it was not certain, though probable, that the entry had been written by the alleged Madame Duval herself. She was visited the next day by the same gentleman who had accompanied her on arriving. He dined and spent the evening with her.

But no one at the hotel could remember what was the gentleman's name, nor even if he were announced by any name. He never called again. Two days afterwards, Madame Duval was taken ill; a doctor was sent for, and attended her till her death. This doctor was easily found. He remembered the case perfectly, -- congestion of the lungs, apparently caused by cold caught on her journey. Fatal symptoms rapidly manifested themselves, and she died on the third day from the seizure. She was a young and handsome woman. He had asked her during her short illness if he should not write to her friends; if there were no one she would wish to be sent for. She replied that there was only one friend, to whom she had already written, and who would arrive in a day or two; and on inquiring, it appeared that she had written such a letter, and taken it herself to the post on the morning of the day she was taken ill.