6] What is the link between:
a) Max Mallowan and 10 Rillington Place
The name Christie is the link. Sir Max Mallowan was Agatha Christie's second husband, and 10 Rillington Place was the scene of a probable miscarriage of justice involving serial killer John Reginald Christie.
b) Betty Joan Perske's first husband, and a dealer in ship's supplies.
Chandler is the link. A dealer in ship's supplies is a chandler; Betty Joan Perske's screen name was Lauren Bacall, and her husband Humphrey Bogart famously played Raymond Chandler's private detective Philip Marlowe in the 1946 movie The Big Sleep.
c) A place of worship and a Celtic people.
Think of places of worship; church, synagogue, mosque? Temple!
South African born Aussie author Peter Temple's private detective is called Jack Irish.
7] How are transport to a music festival, biblical daughters, a lengthy conundrum and a path through trees, all linked to a Maltese Jew?
This question had people stumped. It was even suggested that the Maltese Jew was Peter Lorre, who was in fact born in Austria -Hungary [in present day Slovakia].
It was much more straightforward than that.
Transport to a music festival? Glastonbury, no Woodstock. Transport. Last Bus to Woodstock.
A path through trees, or The Way Through the Woods?
A lengthy conundrum? A conundrum perhaps a riddle. Lengthy? The Riddle of the Third Mile.
Biblical daughters? The Daughters of Cain.
They are all titles of Colin Dexter's books.
The connection with a Maltese Jew is Marlowe's play The Jew of Malta from which comes the quote The Wench is Dead, used as the title of another of Dexter's superb Morse books.
[to be continued, two more answers to come, one elementary, and one a creation of a mind with too many useless facts spinning round in it.]