This is the second postcard I’ve received from an anonymous sender only known as ‘b’. Each card came with equations written on the back, in this instance the Maxwell equations, which I learned ‘describe the interrelationship between electric field, magnetic field, electric charge, and electric current. ‘
The stamps indicate the card was from mailed from Canada.
I’m only posting the image in case it’s connected with some obscure murder and might be helpful to investigators.
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