Lesson 40

http://www.lds.org/media-library/images/church-history/pioneer?lang=eng&start=21&end=30#oxen-pioneer-trek-wagons-hopkinson-827965


http://www.lds.org/manual/primary-5-doctrine-and-covenants-and-church-history/lesson-40-the-first-pioneer-company-crosses-the-plains?lang=eng#listen=audio