In Warsaw Testament, Rachel Auerbach has some background on writing Krzepicki's testimony (in Yiddiah), and nothing is mentioned about this shorter Polish version.
Auerbach says he was using his father's papers (name Abraham), and she only later learned from Krzepicki's brother that his real name was Jakub/Yaakov (despite that being on the contact card accompanying his account that she wrote).
She says she was writing the testimony over the winter of 1942-1943. At the beginning of December, Auerbach was living in an apartment at Nalewki 37, which was assigned to the workers of the artificial honey factory.
Krzepicki was her neighbor at Nalewki 37. But Krzepicki had been arrested at the artificial honey factory at Zamenhofa 19 in August. Then he escaped Treblinka on September 13, and returned to the Warsaw Ghetto after a month. But then he goes right back to the artificial honey factory
Nalewki 37 and Zamenhofa 19 were basically on the same block. Zamenhofa on the west, Nalewki on the east.
The Warsaw Ghetto: A Guide to the Perished City knows nothing about artificial honey factories near these addresses.
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In the Yiddish notebook (not rediscovered until 1950?), there's a note by Auerbach on its own page in the middle of Krzepicki's narrative:
Krzepicki's account was supposedly first published in 1956 by the Jewish Historical Institute.Such a beautiful sky and the forest with trees in it. The world is too small for me. I analyse whether I am happy or unhappy. Either way, I must live. I want to die of natural causes.
Auerbach had immigrated to Israel in 1950 -- before the milk cartons were found.
However, Ber Mark (also of the Jewish Historical Institute) published a book of poetry in 1954, which includes the note from Auerbach, transformed into a poem:
Auerbach writes that "after Ber Mark returned from the Soviet Union, I let him look at my wartime notebooks." The buried Krzepicki notebooks would not have been found by this time.The sky is so blue
In this world
I have no space
A forest full of trees
I look around
Am I happy?
Or unhappy.
I must live
I want to die a natural death.
Ber Mark could have gotten the note from this one unnumbered page from the recovered RA documents. Or he could have been shown it by Auerbach herself in her "wartime notebooks," which is more indication that the Krzepicki notebooks weren't buried, along with the anachronistic dating.