The reaction&pgr;−p→f1(1285)&pgr;−p→&eegr;&pgr;+&pgr;−&pgr;−pat 18 GeV/c is being studied. Thef1&pgr;−system is expected to be an important decay mode for a hybrid meson and a previous experiment (BNL E818) has shown some evidence for such a state withJPC=1−+.The existence of a high quality sample off1(1285)/&eegr;(1295)&pgr;−events in the&eegr;&pgr;+&pgr;−&pgr;−pfinal state has been established. Twelve thousand events have been selected from the 1994 E852 data run. A partial-wave analysis of this sample is presented. All significant waves are produced via natural parity exchange (i.e.f2(1270)or&rgr;0(770)exchange). The strongest contributions are from the1++,1−+,and2−+waves. Interesting relative phase motion is observed between these waves. ©1998 American Institute of Physics.