Sender: Poincaré, Henri Site: Caen Date: 1881-06-15
Recipient/Object: Klein, Felix Site: Leipzig
Source: Henri Poincaré Papers Incipit: Your letter proves

Sender: Poincaré, Henri Site: Caen Date: 1881-06-22
Recipient/Object: Klein, Felix Site: Leipzig
Source: Henri Poincaré Papers Incipit: I have not yet received the items

Sender: Poincaré, Henri Site: Caen Date: 1881-06-27
Recipient/Object: Klein, Felix Site: Leipzig
Source: Henri Poincaré Papers Incipit: When I received your postcard

Sender: Poincaré, Henri Site: Caen Date: 1881-07-05
Recipient/Object: Klein, Felix Site: Leipzig
Source: Henri Poincaré Papers Incipit: I received your letter and read it

Sender: Poincaré, Henri Site: Caen Date: 1881-12-08
Recipient/Object: Klein, Felix Site: Leipzig
Source: Henri Poincaré Papers Incipit: I am infinitely grateful

Sender: Poincaré, Henri Site: Paris Date: 1881-12-17
Recipient/Object: Klein, Felix Site: Leipzig
Source: Henri Poincaré Papers Incipit: I have the honor of sending you

Sender: Poincaré, Henri Site: Paris Date: 1882-01-14
Recipient/Object: Klein, Felix Site: Leipzig
Source: Henri Poincaré Papers Incipit: I received the page proofs

Sender: Poincaré, Henri Site: Paris Date: 1882-03-28
Recipient/Object: Klein, Felix Site: Leipzig
Source: Henri Poincaré Papers Incipit: You appended a note to my article

Sender: Poincaré, Henri Site: Paris Date: 1882-03-28
Recipient/Object: Klein, Felix Site: Leipzig
Source: Henri Poincaré Papers Incipit: Recently you were good enough

Sender: Poincaré, Henri Site: Paris Date: 1882-04-04
Recipient/Object: Klein, Felix Site: Leipzig
Source: Henri Poincaré Papers Incipit: I have just received your letter

Sender: Poincaré, Henri Site: Paris Date: 1882-04-07
Recipient/Object: Klein, Felix Site: Leipzig
Source: Henri Poincaré Papers Incipit: I have the honor of returning

Sender: Poincaré, Henri Site: Paris Date: 1882-05-12
Recipient/Object: Klein, Felix Site: Leipzig
Source: Henri Poincaré Papers Incipit: I am late in responding

Sender: Poincaré, Henri Site: Paris Date: 1882-05-18
Recipient/Object: Klein, Felix Site: Leipzig
Source: Henri Poincaré Papers Incipit: Your last letter interested me greatly

Sender: Poincaré, Henri Site: Paris Date: 1882-09-22
Recipient/Object: Klein, Felix Site: Leipzig
Source: Henri Poincaré Papers Incipit: Here are a few details

Sender: Poincaré, Henri Site: Paris Date: 1895-06-01
Recipient/Object: Klein, Felix Site: Leipzig
Source: Henri Poincaré Papers Incipit: Will you be in Göttingen

Sender: Poincaré, Henri Site: Paris Date: 1895-06-07
Recipient/Object: Klein, Felix Site: Leipzig
Source: Henri Poincaré Papers Incipit: I am very pleased to learn