Once more we have an example in the latter part of the text where John Gilbert, the 1830 typesetter, removed the Hebrew-like and between the subordinate when- clause and the following main clause (“he smote off the head of Shiz”). Using pencil, Gilbert crossed out the ampersand in 𝓟 and then later set the 1830 text without the and.
Here the occurrence of the and in the original text is probably related to the parenthetical clause (“that he rested a little”) that intervenes right before the main clause. The critical text will, of course, restore these original instances of and. For further discussion of Gilbert’s removal of these and ’s, see under Helaman 16:10. For another example, see nearby under Ether 15:15.
Summary: Restore in Ether 15:30 the original Hebrew-like and that occurred before the main clause (thus “and he smote off the head of Shiz”); the earliest extant source, the printer’s manuscript, has the and (written as an ampersand), which the 1830 typesetter crossed out in pencil.