A letter

A letter on a postcard. Without a stamp, with a blue gapa seal. A number stamped - postal number? - next to the addressee's name: 983034. On the left from the address, mathematical calculations in pencil. The letter is from Warsaw to Artur Włodawer. Authorship of the letter uncertain: probably a member of the Włodawer family, but the handwriting is not similar to any other postcard from the Włodawers (MPOLIN-A4.1.32); on the reverse, below the sender's address, a signature similar to that on the verso page, Szmul Ber: Regards, Father. Maria Dziubińska is entered as the sender of the card (residing at 55 Twarda Street; we do not have information about her relations with the Włodawer family).