High field magnetometry measurements were carried out using the Advanced Materials Characterisation Suite, funded by EPSRC Strategic Equipment Grant EP/M000524/1EPSRC. Computing resources were provided by the University of Birmingham's BlueBEAR HPC service and the Sulis Tier 2 HPC platform (EP/T022108/1), with networking support by CCP-NC (EP/T026642/1), CCP9 (EP/T026375/1), and UKCP (EP/X035891/1). A portion of this research used resources at the High Flux Isotope Reactor, a DOE Office of Science User Facility operated by the Oak Ridge National Laboratory. Andrew Jones is thanked for assistance with UV-visible spectroscopy measurements. in Zero Field. I. Excitations. Physical Review B 1972, 5, 2607-2615.