@dracula should look to RLS for inspiration
O mighty sir or madam,
I am Isamandias, son of Ozymandias. Papa and I had to run from our country during a popular uprising. During our dynasty our family hid thirty six million (36,000,000) gold drachmas which nobody knows about in a vast colossus in our capital city. I can trust almost nobody but i know I can trust you to assist, for which I will thank you with 20% (1,800,000 drachmas) on that day on which that trunk of gold is back in my hands.