1935 German Letter

This is a letter of three pages all in German.  It is from some Hospital in Hillsboro, Kansas, where the family was from.  Handwritten on one page it says "paid."  I have to assume it was a bill or something.  It is postmarked 1935.  I'm guessing this was soon after they arrived in California during the dustbowl.  It is addressed to Grandpa on "N" Ave.  This is an address I have never seen before.
But, the interesting thing is that Grandpa (John B. Dick) signed the letter and it is addressed to Grandpa.  (John B. Dick)  What the heck!