Here is a case where John Gilbert, the 1830 typesetter, did not omit the Hebraistic and that originally separated the subordinate if- clause from its following main clause. Ultimately, the editors for the 1920 LDS edition removed the original and, but the RLDS text has retained it. In the last part of the text, Gilbert frequently removed these extra and ’s, as in two nearby cases in 𝓟 where he marked the deletion in pencil prior to setting the type:
For further discussion of Gilbert’s deletion of the Hebraistic and, see under Helaman 16:10.
Summary: Restore in Ether 14:1 the Hebraistic and that originally separated the subordinate if- clause from its following main clause; such usage was fairly common in the original Book of Mormon text.