What happened during Jack the Ripper's crime sprees and what exactly did police do to investigate Jack the Ripper's crimes? How did they process any clues? What evidence did they find? What were their successes? What were their failures?

answer; i believe the correct answer is (the willamete valley);

the lachish letters were written by hoshaiah, a military officer stationed possibly in mareshah,   and sent to yaush, possibly the commanding officer at lachish.

the series of letters were written in carbon ink in ancient hebrew on clay ostraca, shortly before lachish fell to the babylonian army of king nebuchadnezzar in 588/6 bc during the reign of zedekiah, king of judah.