Many thanks to David and Marian. Marian’s legwork made it possible!  I sent an email to NARA in the afternoon and the next morning received the scan from a very efficient archivist.  The letter describes the young daughter of the detainee, Itzke Rubenstein.  I am pretty sure he is her stepfather and the daughter was my husband’s beloved mother Lily. Thanks,
lynn dumenil
 Thanks