L.L.? II

See L.L.? 

I must be brief but there is a parallel here. In a detective novel by Poul Anderson, a murdered man has scribbled the letters "L.L." (See the above link.) In The Hound Of The Baskervilles, Sir Charles Baskerville who died in mysterious circumstances had received a letter from a woman who had signed it with the initials, "L.L."

What can we make of that? Although I have read both books before, I can remember neither what the letters meant in the Anderson book nor who the woman was in the Conan Doyle book. But I will shortly be reminded of the latter. And I will shortly also know what is the secret mission of Allen Lancaster in Anderson's "Security." Fictional universes are complicated and many of their details are forgotten.