How did Isaiah die? Did the king (son of hezakiah/ Manasseh) kill Isaiah by having him cut in half? I’m was told of 2 Sources: the “ ascension of Isaiah” /and “fox book of martyrs”.  / Heb.11:37 They were stoned, they were *sawn *asunder, were tempted, were slain with the sword: they wandered about in sheepskins and goatskins; being destitute, afflicted, tormented
links and tags 

Old Testament Pseudepigrapha volume 2 page 143. And this tradition is also found in the Talmud b.Yeb. 47b. See Hebrews 11:37 which refers to this tradition generally saying "others were sawn apart".

https://www.earlychristianwritings.com/text/ascension.html ;

https://www.gotquestions.org/Ascension-of-Isaiah.html

https://www.gotquestions.org/how-did-Isaiah-die.html

Many are claiming this is the lost city of Atlantis.Link with interesting videos 

Gold sandals and toe jewelry found in tomb of king tut and disowned for a journey into the afterlife. (Rev.1:15)