the doctor, as a highly competent (despite all appearances) Correspondent with a very deep understanding of the Red Science, does get inquiries for work, but he's choosy about which projects he takes on given that he much prefers to be doing dubious research or sewing up the newly-dead. that, and he's visibly insane and disreputable even for a Correspondent, and he lives out in a monster-ridden marsh, so most folks end up commissioning someone else.

that being said, he is known to the zailors of London for the tools he makes for them. spyglasses that can see through fog. filters that render zeewater (mostly) drinkable. compasses that always point towards London. simple devices, but all the more sturdy for their simplicity, and invaluable in the hands of a competent zeefarer.

(after all, the doctor first created them as gifts for Rafael: to keep him safe on his travels, and to help him find his way home.)

the doctor's familiarity level with each of the Calendar Council, minimal spoilers version

some OC facts:

• Wren, like the doctor, does not eat meat. this is not out of a philosophical stance so much as she finds that it tends to aggravate her hunger rather than sate it
• despite the fact that he'll neglect his own nutritional needs to an alarming degree, the doctor will insist that his friends eat properly (especially Nathan and Wren) and will work to procure things like fruit, lentils, soy, etc for them.
• this is a constant source of affectionate frustration for said friends, who will gently but forcibly drag the doctor away from his studies to eat a proper d__n meal with them

Nathan and Wren are the leading members of the "make the good doctor eat at least one proper meal per day" committee