On 20 January 1944 Blumenthal was sent, at his own request, to the "old people's ghetto" Theresienstadt since he had heard that his sister had been sent there in July 1942.
Sa 20 Enero 1944 Blumenthal ay ipinadala, at ng kanyang sariling humiling, na ang "old people's ghetto" Theresienstadt magmula ng siya ay narinig na ang kanyang mga kapatid na babae ay naipadala doon sa Hulyo 1942.