Coded Message No. 1

Here is a postcard sent from Hitchin, Hertfordshire, in 1934.  The face shows a picture of Letchworth:

A nice picture, but the reverse is far more interesting:

My first instinct is to say this is shorthand, which I don't actually know; so it could be some other form of disguised script.  There is also the chance, given the address, that it is not written in English.