ACKNOWLEDGMENTS

The Martian Way, by Isaac Asimov, copyright © 1952 by Galaxy Publishing Corporation. Reprinted by permission of the author.

Earthman, Come Home, by James Blish, copyright © 1953 by Street & Smith Publications, Inc. Reprinted by permission of the author and his agent, Robert P. Mills, Ltd.

Rogue Moon, by Algis Budrys, copyright © 1960 by Algis Budrys. Reprinted by permission of the author and his agent, the Lantz-Donadio Literary Agency.

The Spectre General, by Theodore Cogswell, copyright © 1952 by Street & Smith Publications, Inc. Reprinted by permission of the author.

The Machine Stops, by E. M. Forster, from The Eternal Moment and Other Stories by E. M. Forster, copyright © 1928 by Harcourt Brace Jovanovich, Inc.; copyright renewed 1956 by E. M. Forster. Reprinted by permission of Harcourt Brace Jovanovich, Inc.

The Midas Plague, by Frederik Pohl, copyright © 1954 by Galaxy Publishing Corporation. Reprinted by permission of the author.

The Witches of Karres, by James H. Schmitz, copyright © 1949 by Street & Smith Publications, Inc. Reprinted by permission of the author and his agents, Scott Meredith Literary Agency, Inc.

E for Effort, by T. L. Sherred, copyright © 1947 by Street & Smith Publications, Inc., copyright © 1972 by T. L. Sherred as part of the collection, First Person Peculiar. Reprinted by permission of the author and his agent, Virginia Kidd.

In Hiding, by Wilmar H. Shiras, copyright © 1948 by Street & Smith Publications, Inc. Reprinted by permission of the author.

The Big Front Yard, by Clifford D. Simak, copyright © 1958 by Street & Smith Publications, Inc. Reprinted by permission of the author and his agent, Robert P. Mills, Ltd.

The Moon Moth, by Jack Vance, copyright © 1961 by Galaxy Publishing Corporation. Reprinted by permission of the author and his agents, Scott Meredith Literary Agency, Inc.