This card was purchased in an antique store in Hillsborough, North Carolina.  It is addressed to:

Miss Lu Scheiffler
Jackson Mich
531 W. Biddle Street

Postmark is:

DETROIT
MAR 31
7 PM
1916
MICH

It reads as follows:

Detroit 1915
Lu — Ernest took the key down the next day.  Mrs. McCrie said she never missed it.  Thank you for the birthday card.  happy Easter day to you all.  Kittie & Ern

Don’t you just adore the handwriting from back then?  A lost art!

click on images to enlarge.