Ths Silkworm's Career of Running Black Ink: What connections are there between the The Running Grave and Strike 2, 3, and 6?

Ring Composition predicts that there would be far few connections between The Running Grave and Books 2, 3 and 6 than seen with books 4 and 7. But, you never know.  John Granger has shown that a simple turtle-back ring diagram  does not explain all connections in Harry Potter (such as the many echoes between books 1 and 5 and between books 3 and 7); for explanation, see his asterisk model.  There are multiple connections, such as the many already documented between Troubled Blood and The Running Grave, that, best I can tell, are predicted neither by ring structure or the asterisk. I myself fell into the trap of being so busy looking for connections between Troubled Blood and Career of Evil, that I missed many equally strong connections between Troubled Blood and The Silkworm.  

I am working on a new, comprehensive model of how remainder of the series might be structured, now that we have seen Book seven and know to expect ten, but it will likely take a while to get that together. So, this is where we need sharp-eyed Serious Strikers, who are perhaps not as biased towards specific hypotheses as I am, to not be shy about identifying connections that come up.  As I said, I am not expecting as many compared to the long lists already compiled for Books 1, 4 and 5, but I would be happy to be proved wrong. Given the connections seen between Prisoner of Azkaban and Deathly Hallows, we might expect more with CoE, but who knows?

Spoilers below. 

The Silkworm Echoes

1. Jonathan Wace explicitly recalls Liz Tassel to Strike, with her cold, black, shark-like eyes. 
2. Roper Chard also gets a mention as Kevin Pirbright's potential publisher. 
3. Strike buys his nephews identical combat-related gifts at Hamley's, just as he does for Christmas 2010 (and 2013, in TB). 
4. Kinky pictures of people having sex are found.
5. Strike does not initially pick up the phone when Leonora Quine calls him to say she's been arrested. He also does not pick up Michael Ellacott's first calls saying Robin has been taken in for questioning. 
6. Robin saves the day with her advanced driving skills. 
7. Ilsa helps Strike in her capacity as a lawyer. 
8. In the aftermath Mrs. Cunliffe's death, Robin reflects, while sitting in the church that, as a child, she always wanted to know why there was a stone crab on the wall. In the aftermath of Charlotte's death, Strike visits a tower he had seen and always wondered about in the commune; it turns out to be a church tower. He enters and quietly grieves for Charlotte. 
1. Robin, OTOH, was daydreaming at the funeral precisely because she wasn't genuinely grieving over Mrs. Cunliffe, who hadn't liked Robin much.
9. When Robin had to come up with fake confessions for her Revelation, she falsely claimed Matthew's offenses against her. The only "real" confession of her own was her nearly missing Mrs. Cunliffe's funeral in SW. 

Career of Evil Echoes

1. April Wardle is introduced as a blue-haired. part-time burlesque dancer in CoE; Strike was surprised at her appearance, which made him like Wardle better.  We get her first significant mention here, when we learn she has left her husband and taken their young baby. 
2. We also meet Alyssa and her daughter Angel in CoE, Angel being the child abuse victim Robin saves from Brockbank, with Shanker's help and nearly at the cost of her job. While little sister Zahara got a mention in IBH, this is the first we have heard of Angel since CoE. This time, Strike aids Shanker in helping her find her birth father, after April is diagnosed with leukemia. 
3. Dominic Culpepper is also mentioned, both by new improved journalist Fergus Robertson and near the end, apparently sleeping with a woman for stories, which is what he asked Strike if he was doing at the beginning of CoE. 
4. Tigger the terror terrier barked and bit Strike when our heroes arrived to interview Lorraine McNoughtan. Basil was equally unruly at Niamh Doherty's home. In both cases, our heroes were given an important photograph and other information that would be crucial to the case. 
5. Robin tells Strike (CoE) and Prudence (TRG) of her rape and subsequent mental health issues, though she would have preferred not to. 
6. Strike, while in Melrose, hears men singing a school song at a wake for a deceased friend, and reflects that Ted would one day be mourned this way, in St. Mawes, and hopes it is far in the future. This is a poignant link to Ted's diagnosis of dementia which will likely take his life fairly soon, the necessity of moving him to London and the remark that half his friends are dead. 
7. Strike impersonates a gas inspector to gain entrance to Whittaker's flat; Dev impersonates a heating inspector to get access to the club to trap Bigfoot.  
1. Both Strike and Dev get a busted nose as a result.  
8. The visceral hatred Strike described feeling for Whittaker is similar to that he felt for Macolm Crowther. 
1. Both were responsible for sexual abuse of Lucy. 
9. We learn that Carver's botching the Ripper case in CoE got him forced out of the Met, and that Mitch Patterson was a friend of his. 
10. Strike offers Robin brandy after the leg is delivered, though he doesn't have any. He gets her brandy after her rescue from the UHC. 
11. Shanker reflects that Robin was like Leda in wanting to help a child in CoE.  He points out that Leda loved all her children and reminds Strike about the existence of Switch in TRG. 
12. Wardle and Ekwensi visit the detectives together for information about a case. 
13. Cliffhanger ending!

The Ink Black Heart Echoes

1. Phyllis, the philodendron Strike gives her in IBH, is the only one to survive Murphy's care-taking. Note to Robin:  ask Pat next time. It's also the only one she names. 
2. Ilsa is concerned about Strike's sexual relationships with Robin-substitutes.
3. Bijou, whose self-chosen nickname means jewel, is an unstable sexual distraction for Strike, just like jeweler Madeline was.
4. Robin gets Pat a medicinal glass of port at the Tottenham in IBH; Strike does the same in TRG.  

It looks, for now, like the most, and the most significant echoes, as predicted, are between 3 and 7.  The fewest are between adjacent books, as is typical for the rest of the series, with the exception of Troubled Blood, and Ink Black Heart, which are linked by the presence of a misogynistic serial killer, a factor that also links TB to CoE. More on this in a future post.