unworked, has had material assistance from Governor Thos. E. Campbell,
himself a student of Arizona history, especially concerned in matters of
development. There has been hearty cooperation on the part of the
Historian of the Mormon Church, in Salt Lake City, and the immense
resources of his office have been offered freely and have been drawn upon
often for verification of data, especially covering the earlier periods.
There should be personal mention of the late A.H. Lund, Church Historian,
and of his assistant, Andrew Jenson, and of Church Librarian A. Wm. Lund,
who have responded cheerfully to all queries from the Author. There has
been appreciated interest in the work by Heber J. Grant, President of the
Church, and by many pioneers and their descendants.

The Mormon Church maintains a marvelous record of its Church history and
of its membership. The latter record is considered of the largest value,
carrying out the study of family genealogy that attaches so closely to
the theology of the denomination. During the fall of 1919, Andrew Jenson
of the Church Historian's office, started checking and correcting the
official data covering Arizona and New Mexico settlements. This involved
a trip that included almost every village and district of this State.
Mr. Jenson was accompanied by LeRoi C. Snow, Secretary to the Arizona
State Historian and a historical student whose heart and faithful effort
have been in the work. Many corrections were made and many additions were
secured at first hand, from pioneers of the various settlements. At least
2000 letters have had to be written by this office. The data was put into
shape and carefully compiled by Mr. Snow, whose service has been of the
largest value. As a result, in the office of the Arizona State Historian
now is an immense quantity of typewritten matter that covers most fully
the personal features of Mormon settlement and development in the
Southwest. This has had careful indexing.