1 3 8 V O L U M E 9 , D O C U M E N T S 1 4 8 b , 1 4 9 a
and is developing much understanding and love for this enterprise; he’s making
very rapid progress and seems to be much more musical than one would have
thought earlier.
is very skillful and is always building something. Now he
even earned a few francs through the sale of a little model of his own making.
With amicable greetings,
Vol. 9, 148b. To Elsa Einstein
[Leyden,] Tuesday or Wednesday ? [23 October 1919]
Dear Else,
This stay is extraordinarily charming. Tomorrow we’re driving out to see De
Haas, who is
ill.[1] Ehrenfest[2]
is a very conscientious impresario; he’s keeping ev-
eryone off my back this time. I play music, talk shop, and converse with him about
all sorts of things. He is an incomparably inspiring person. Today at the colloquium
he delivered a talk that was simply masterful. The plates of the expeditions have
now been measured (definitively). My theory has been verified exactly with the
greatest precision conceivable. Eddington reported it
Now no rational per-
son can doubt the validity of my theory anymore. This evening two letters of yours
arrived at once. I didn’t send you a telegram upon arrival because it was already ter-
ribly late and I was lucky enough to get a room through the help of a Dutch fellow
passenger. Planck is also going to Rostock; he wrote me
Many thanks to
Ilse for the message; I will send
Warm greetings & kisses from your
Vol. 9, 149a. To Elsa Einstein
[Leyden,] Friday [24 October 1919]
Dear Else,
One week is almost over already, a really wonderful and harmonious
And the glorious, rare weather of brilliant sunshine here! Yesterday I was with
Ehrenfest in Delft, where we visited de Haas, who unfortunately fell quite disturb-
ingly ill (tenacious bronchitis, had already been tubercular
There I also
saw Lorentz’s magnificent daughter
—these Lorentzians are superhumans
in the noblest sense. Then we wandered about in Delft—a very picturesque city.
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