Fifty-six scientists from the United States, Canada, and five European countries met at the University of Texas at Dallas, November 1–3, 1973, for a symposium on the magnetospheric cleft or cusp. A dozen different aspects of the cleft were each introduced by half-hour invited talks; these were followed by contributed papers. Nearly half of the total time was unscheduled, permitting extensive and detailed discussions. This format was similar to the format of the substorm conference held last year (see the report by T.W. Hill, E&S, Dec 1972, p. 1148). Our experience again demonstrated the value of such a topical conference, the opportunity for extended discussion being highly valued by all.