From Elder George W. Crockwell, laboring in Sioux City, Iowa, we recently received a letter in which occurs the following: "There are a great many Seventh-day Adventists in this city, and in talking on the gospel with them I have been unable to confute their arguments, to my satisfaction, against our worshiping on the first day of the week. In reading the scriptures I find only the following passages that in any way refer to the matter, but they are not conclusive: John 20:19-26; Acts 2:1; Acts 20:6, 7; I Cor. 16:1, 2; Rev. 1:10; Mark 2:27, 28; Luke 6:5; II Cor. 5:17; Eph. 2:15. Any information you may give me will be thankfully received; and allow me to suggest that a tract covering this question would undoubtedly be of material assistance to Elders laboring in sections of the country containing Adventists." Seventh-day Adventists constitute a religious sect whose chief characteristics are that they believe in the personal and glorious coming of the Lord Jesus Christ; and that the holy day of worship appointed of God is the seventh day of the week instead of the first. Hence their name--Seventh-day Adventists. Owing to the fact that modern Christians deny the continuation of revelation after the days of the apostles, and as they cannot point to any direct revelation, or positive apostolic institution in the New Testament by which the first day of the week was substituted for the old Jewish Sabbath, the seventh day, which Jesus during his lifetime honored by observing, the Adventists have other Christians at somewhat of a disadvantage in this controversy. The Elders of the Church of Jesus Christ of Latter-day Saints, however, need not be embarrassed by the arguments of Adventists, since the Church of Christ in this last dispensation has the warrant of God's word, by direct revelation, for keeping holy the Lord's day, that is, the first day of the week, as a day Of public worship and thanksgiving, a holy Sabbath unto the Lord. It is not our intention, however, to avoid a discussion of the question by thus placing it on entirely new ground, and making the success of the issue depend upon one's ability to make it clear that God has given such a revelation, although that is a position that can be consistently taken by our Elders. But we desire to point out the evidence we have (1) from the New Testament, and (2) from the practice of the early Christian church, for observing the first day of the week as a day of public worship, sanctified and set apart as the Lord's day. By doing so we shall be able to show at least that there is a very strong probability that the change from the seventh to the first day of the week was made by the Lord Jesus Christ himself, after his resurrection; that it was perpetuated by his apostles and the early Christian church; and then, in conclusion, shall cite the revelation referred to which, to the Latter-day Saints, changes this "probability"