From the diary of JDT, about the content of the found note at the graveyard in England, 1933
"Dear Sir, Even I was fully against the idea of approaching you. My father wanted to have an audience with you as he thinks you will never abandon the idea of finding the truth about that day in Cairo. If that is the case, let us talk about the things you are so interested in knowing about.
Meet us tomorrow at noon at the flat just right next door to the Royal Albert Hall in Kensington, London
Evelyn"
Congratulations on solving META puzzle from A set!
As first one to read this message, you have earned a free hint my friend! Just formulate your question and ask me on twitter, starting your question with: "I am a friend of Johannes Zukertort" and I will give you a nudge in proper direction for any puzzle from any set you have selected!
D.