Here scribe 2 of 𝓟 initially omitted the and between these two infinitival clauses, but soon thereafter he inserted inline an ampersand (the level of ink flow is unchanged). His corrected reading most probably represents the original text here. It is theoretically possible for and to be lacking between infinitival phrases, yet the Book of Mormon text almost always prefers a connecting and, as in the following example where the conjoined infinitive phrases are found within a present participial clause (as here in Mosiah 26:39):
Summary: Continue to follow in Mosiah 26:39 the corrected reading in 𝓟—namely, scribe 2’s inserted and between the two infinitival clauses.