[X] Head back to the hospital to check on Jackson's condition. But..
-[X] Secure the splashes of the cultist's blood, and head back to Red realm to see if you can make a sympathetic painting with Emily to use to track them. Something similar to the concept you used in the orphanage. Before you leave, you want to follow up on whatever that went down here in this city.
-[X] Contact Jackson's publisher Jonah Kensington to ask about more of Jackson's research notes. Say he is hospitalized and they might be critical in finding out what who was targeting him and why.
[X] Head back to the hospital to check on Jackson's condition. And..
-[X] Go back to the Red realm and make preparations to enter Jackson's dream. Before you leave you want to ascertain directly with him about what the crisis is.
-[X] Discuss your approach with Emily. You have a nightmare spell that you could modify to act purely as a bridge instead with dream magics. And paint your way into his dream. Using the herbs from before. Furthermore Phileas's instincts to call upon and Emily's knowledge of the dreamworld and her new magical focus. There is also the bridge to Phileas's world you could potentially use.