[George F. Gibbs to John W. Hart]
President [Joseph F.] Smith invites you with your wife to come to the temple to receive your second blessings. If you prefer to go to Logan, please let the president know and he will send you the usual recommend. These blessings are administered on Fridays in the Salt Lake temple.
[Source: George F. Gibbs to John W. Hart, June 14, 1913, in Anderson, Devery; The Development of LDS Temple Worship, 1846-2000: A Documentary History, http://amzn.to/TempleWorship]