Simplify the following text for a Grade 8 native English-speaking person.
Original: Thomas Morley ( 1557 or 1558 -- October 1602 ) was an English composer , theorist , editor and organist of the Renaissance , and the foremost member of the English Madrigal School .
Simplified: Thomas Morley ( born Norwich ? , 1557 or 1558 ; died London , October 1602 ) was an English composer , music theorist and organist .