The Abraham Lincoln Presidential Library and Museum is in Springfield, Ill. The executive assistant is Sharon Petrilli.

The Abraham Lincoln Institute is an organization based in Washington, D.C., that provides free informational resources about the life and work of Lincoln.

Lincoln/Net is a project of Northern Illinois University to put all of Lincoln’s political and personal materials online. A section on historical themes includes information on the religion and culture of Lincoln’s times.

The Library of Congress maintains a searchable online collection of Abraham Lincoln’s papers.

The Abraham Lincoln Association’s Abraham Lincoln Online is a virtual library of all things Lincoln – biographies, news, events and the 16th president’s own writings and speeches, including a collection of his statements on religion.

David Gordon White is a professor of religious studies at the University of California, Santa Barbara. He is an expert on the religions of South Asia and contributed an entry on dogs to The Encyclopedia of Religion.

Suzanne Crawford O’Brien is an assistant professor of religion and culture at Pacific Lutheran University in Tacoma, Wash. She is an expert on the religious and spiritual attitudes and practices of Native Americans and animals.

Keith Akers is a Christian vegetarian and environmental activist who lives in Englewood, Colo. He operates the Compassionate Spirit website, which includes articles and commentary on animal welfare from a Christian perspective.

The Rev. Thomas Hughson is an associate professor of theology at Marquette University in Milwaukee. He is a member of the American Academy of Religion’s group on animals and religion and author of a paper titled “Wolves and Religion: Can Christianity Assimilate ‘Religious Experience’ of Animals?”