Alan Murdie's "Haunted King's Lynn" article is interesting.
he asserts that what should have been a major interest story (the Raynham ghost) became an obscurity as there was so much else going on to choose from - the 1930s being a great decade for daily mysteries and marvels... {{list of examples follows}}
I'm wonderng if these reported peaks in Forteana coincide with times of great unrest in the world, as if people are looking for distractions from more everyday fears and uncertainties (economic depression, the rise in Fascism, the increasng probability of major devastating war) and news outlets are providing this. AM goes on to noe, in passing, that the drabness of post-war Britain and the grim reality of getting on with reconstruction led to " ... drop(ping) out of circulation and popular consciousness rather quickly" with only one less socially prestigious ghost being seen.
Then again, as Cold War tensions heightened towards the end of the 1940's we get the UFO thing beginning in its modern form; this peaks during the 1950's and in the early 1960's, there's the Cuba Missile Crisis - does this coincide with a peak in UFO sightings and interest?
And today - economic depression, the rise in political extremism, the increasing probability of major devastating war over the ukraine and elsewhere with lots of little wars going on - are Strange Things on the rise again?
Also, the higher social class of ghost seen here. AM alludes to a rather more proletarian Woman in Brown who never caught the public imagination. It's interesting these are always high-status noble ghosts in country mansions, as if only the upper classes get the option!