The green archer by Edgar Wallace

A nice story, adventure, not crime; well, crimes are involved, but this is an 'adventure' structure, not a crime novel one. There is only one mystery, and that is the identity of the green archer, but honestly I can't say  it had any importance whatsoever to me. The book wasn't bad, anyway, too long but I kind of liked reading it, but once is enough so no spoilers warning is needed since I don't want to read it again.
The main man of the book is Abe Bellamy= ugly, uneducated, rude and evil to the core. He's American but lives in England. He has bought a castle, Garre I think it was called, that was once used as a tribunal so it has cells underneath, something like that.
Valerie Howett is a very determined girl. She knows her dear dad Mr Howett is not her real father, and for years she's been investigating to find her real mother. She's sure Abe had something to do with her disappearance; Captain Jim Featherstone is there to protect her and of course the two fall in love. Spike Holland is a journalist who follows the whole thing. Julius Savini is the European/Asian secretary of the unpleasant Abe, and Fay is his wife. John Wood is a good and rich man living in Belgium, who cares terribly about poor children, and hates evil Abe.
23 years ago Abe stole Elaine Held's baby girl because, after having married his brother Michael instead of him, having lost everything and being now a widow, she still refused to marry him. Abe had his revenge taking her baby away. He gave it to a couple looking to adopt, then a few years ago, maybe eight, I'm not sure, he found Elaine again and trapped her in a secret cell!
Now he finds out her daughter's here, that she's rich and that she wants to find Elaine. He plans to have her abducted, sent far away on a boat and married to a disgusting criminal. He was about to succeed, but not only Jim opposed him. Julius and Fay, despite their past of thieves, help her and save her. During all this, there's the unknown figure of the green archer, who is not a ghost but a man who has killed with his bow and arrows Coldharbour Smith, the criminal that was about to sail with Valerie locked inside, and also Mr Creager, another disgusting man who used to take Abe's money to carry out his evil deeds when he was a prison guard. He freed Elaine from her cell and helped Valerie when she was in danger. The only thing not clear is why, when he went back to the cell to retrieve Elaine's diary, he did not leave it open so to free poor Julius and Fay ,trapped there by Abe? Didn't he know? Didn't he ask himself who had left all those lights on?
Anyway. Abe does not give up on his revenge: he traps Julius and Fay where Elaine once was, then he also traps Jim, then he sends rotten-to-the-core Lacy to abduct Valerie and lock her up too. Once it is done, Abe locks Lacy in the cell with the others. Finally the green archer comes to kill Abe and open their door. Lacy still tries to kill Jim, but Julius saves him.
Jim had been jealous of Valerie and John Wood's connection, but in the best Star Wars tradition it turns out that John is her brother, real name John Bellamy, first child of Michael and Elaine.
In the last page we 'find out' the identity of the archer... but honestly, at this point who else could it be? Not Jim, not Julius, trapped in the cell. He was on the good-side, so not one of the criminals. Honestly I couldn't imagine Mr Howett in such an action role... the journalist was impossible... the only other recurrent name was John Wood...