and then he was off again , moving rapidly along the winding tunnel , deeper , deeper into the earth and as they went the mysterious man known as elrin jinn began to sing : `` into the heart of the deep you go , into the kingdom that lies below , secrets and treasures are waiting there , for you to come and claim your share , with fortune travelling at your side and lady luck as your bride , take as much as you can hold , if you are daring , if you are bold . ''