This shows the hospital after the initial building, with no wings.

The message reads:-

Dear M.
You see I have kept to my promise although it has taken long time to arrive. I shall expect a PPC (picture post card) from you now so don't forget there's a --------
hoping you are working hard with Euclid etc. I know you like these subjects
Kate W.

On the front of the card is written:-
What do you think of this I hope you like it.