A recent paper in Physica Scripta discusses the influence of temperature on field-assisted electron emission from accelerator surfaces, concluding that the emission comes from the surface of a dielectric microparticle rather than from a metallic protrusion. This conclusion has not been validly reached, because the theory used contains many known errors. This Comment re-states standard theory for electron emission effects influenced by both temperature and electrostatic fields and re-examines the reported experimental results. It is concluded that the reported experimental temperature effects are not compatible with Murphy-Good field-electron emission theory (which is a useful and significant result), but that further research is needed before any firm conclusion can be reached about the actual mechanism of emission.