Jeremiah 40:15 in 6 translations

Then Johanan the son of Kareah spake to Gedaliah in Mizpah secretly, saying, Let me go, I pray thee, and I will slay Ishmael the son of Nethaniah, and no man shall know it: wherefore should he slay thee, that all the Jews which are gathered unto thee should be scattered, and the remnant in Judah perish?

1611 / 1769 · Public domain · The Authorised Version, revised to the 1769 Blayney text. Includes the Apocrypha as printed in 1611.

Then Johanan the son of Kareah spake to Gedaliah in Mizpah secretly, saying, Let me go, I pray thee, and I will slay Ishmael the son of Nethaniah, and no man shall know it: wherefore should he take thy life, that all the Jews that are gathered unto thee should be scattered, and the remnant of Judah perish?

1901 · Public domain · The American revision of the English Revised Version. Deliberately literal, and the base text behind several later translations.

And Johanan the son of Kareah spoke to Gedaliah in Mizpah secretly, saying, Let me go, I pray thee, and I will smite Ishmael the son of Nethaniah and no man shall know it: why should he take thy life, and all they of Judah who are gathered unto thee be scattered, and the remnant of Judah perish?

1890 · Public domain · John Nelson Darby's translation, made for close study rather than public reading. Often exposes grammatical detail other versions smooth over.

And Johanan son of Kareah hath spoken unto Gedaliah in secret, in Mizpah, saying, `Let me go, I pray thee, and I smite Ishmael son of Nethaniah, and no one doth know; why doth he smite thy soul? and scattered have been all Judah who are gathered unto thee, and perished hath the remnant of Judah.'

1898 · Public domain · The most extreme word-for-word rendering here, keeping Hebrew and Greek tense and word order at the cost of natural English.

Then Johanan the son of Kareah spoke to Gedaliah in Mizpah secretly, saying, “Please let me go, and I will kill Ishmael the son of Nethaniah, and no man will know it. Why should he take your life, that all the Jews who are gathered to you should be scattered, and the remnant of Judah perish?”

2000s · Public domain · A modern-English update of the ASV. Reads close to contemporary speech while staying in the literal tradition. Includes the Apocrypha.

Then Johanan, the son of Kareah, said to Gedaliah in Mizpah secretly, Let me now go and put Ishmael, the son of Nethaniah, to death without anyone's knowledge: why let him take your life so that all the Jews who have come together to you may be sent in flight, and the rest of the men of Judah come to an end?

1949 · Public domain · Written with roughly a thousand basic English words plus a small Bible vocabulary. The plainest reading available here.