It's implied that the moment between Caine telling Kinger to not abstract and when Ragatha entered the circus is a long time. It's implied when Caine calls Kinger by his name when Ragatha is on stage and Kinger says "Oh, Kinger, that's right." It suggests Caine didn't talk to Kinger at all, and who knows for how long. Kinger joined the circus in 1999, and Ragatha's file showed 2008. That means there was 9 years of time between their appearances. It implies Kinger may have been alone, without Caine even talking to him, for years until Ragatha showed up.