D O C . 1 1 2 S E P T E M B E R 1 9 1 9 9 7 112. To Walter Dällenbach (Berlin, 5 Haberland St.), 27 September 1919 Dear Mr. Dällenbach, It is a pity that your so honestly and sensibly meant endeavor has lost a sound footing![1] But it is no wonder. Reason is not a bond by which people on Earth can be linked together for a longer time. Still, your accomplishments up to now are as- tonishing and speak for the human energy and skill that formed the soul of the en- terprise. I am glad that you want to lecture at the Poly[technic]. It is, in fact, neces- sary that electricity be taught there by someone who has a deeper insight into the interconnections.[2] Should I write to someone (Gnehm)?[3] I shall be pleased to do so if you believe that it makes sense. I cannot judge whether the plan to write a little book is a good one. I consider you capable of making a good job out of it but do not know whether there is any substantial demand among engineers and whether there is any lack of suitable literature.[4] I am completely unfamiliar with that make inquiries sometime, maybe also by letter to Springer, who does virtually all elec- trotechnical material here at his publishing house he would possibly be very well suited as the publisher, because he has powerful advertising resources.[5] I would be happy to take a look at the manuscript, but it would be of little value you need to listen primarily to criticism by an intelligent, young, local engineer who is not yet familiar with all aspects of the material. I cannot imagine that you would be paid for it by an electrical firm, since the product obviously does not benefit them specifically. Besides, I would think it much more important that you work directly in applied technology. I know a few younger physicists here who maintain long- term informal ties with electrical firms and are paid quite decently.[6] That is what you should strive for. It is not good to turn to the subject of engineering without having direct contact with technical practice. Give it a try once. This is now much more important for your development than writing a book so it seems to me, at least. What do you think? You should not take Michele’s monastery too seriously. Even in maturer years one needs still unspent illusions, and from project to deed is a long and quite gru- eling path for my dear friend that is very rarely taken.[7] Give him my cordial greet- ings when you see him. If I had his address I would write him myself. I am traveling to Holland for a couple of weeks [8] I’m telling you this in case you do not receive immediate answer to any letters. Best regards, yours, A. Einstein