  We observed the isolated neutron star RX J720.4-3125 with Chandra's Low
Energy Transmission Grating Spectrometer, following the XMM-Newton discovery of
long term spectral evolution of this source. The new observation shows that the
spectrum of RX J720.4-3125 has continued to change in the course of 5 months.
It has remained hard, similar to the last XMM-Newton observation, but the
strong depression observed with XMM-Newton at long wavelengths has disappeared.
Contrary to the XMM-Newton observations, the new Chandra observation shows that
the flux increase at short wavelengths and the decrease at long wavelengths do
not necessarily occur simultaneously.
