H.G.'s outfit, described by Myka as what American filmmakers think fashionable British archaeologists are wearing nowadays, and H.G. finds ever so comfy, is based on the outfit that Lara Croft is usually seen wearing: vest, shorts, and boots.
The 'Neural Assessor' monitoring Mrs. Frederic's brainwaves is mainly a Model 6303 Keeler Polygraph, with an added "Moon phase" display. It would normally have 3 chart needles.