Neutron scattering measurements are reported on the mixed valence compounds Ce1−xThxand TmSe. The &khgr;″(Q,&ohgr;) as derived from the inelastic spectra of Ce0.74Th0.26shows a peak in the &ggr; phase near 20.0 meV and shifts abruptly to greater than 70.0 meV at the transition to the &agr; phase. The temperature independence of the susceptibility within the &ggr; phase cannot be simply reconciled with the temperature dependence of the valence within the &ggr; phase. TmSe is shown to order in a type I antiferromagnetic structure belowTN∼3.2 K. The magnetic phase diagram is understood as a successive domain reorientation and a metamagnetic phase transition forT<3 K with increasing field. The mixed valence nature manifests itself in a reduced moment and a markedly altered crystal field. Another sample of TmSe with a lattice parameter implying 100&percent; Tm3+exhibits spin correlations characteristic of a type II structure but never achieves long range order.