Simon recognized the look. It wasn't that Hatter looked overly bewildered, but too much information had a habit of giving the listener a particular lost look. So, the good doctor closed up the sack and set it closer to the man. Or boy. Simon would bet the fellow wasn't much older or younger than himself.
"Yes, sewing up wounds. I hope you don't need to, but there is always a chance something might happen." A very big chance when someone was deciding to escape or save lives or some such heroing. "Nothing in that bag requires a medical degree. It's basic first aid really. Some of it slightly more than you need, but it should help. Remember to boil your water."
Simon turned his back on Hatter to look over some instruments. His eyes closed as he heard the man had no knife. He didn't know Hatter, and he couldn't possibly know whether or not the man would use a scalpel or some other sharp object to hurt another person; but, he couldn't let Hatter go out there unprepared.
"Get a good clean steak knife. If you are able, a sharp chef's knife would be good. A scalpel might be handy, but I don't know where you'd get one." Simon might have nudged one to the side; the tip was wrapped in cardboard. "Something clean and sharp. Sharp is always the key. Dull knives cause more damage than cure."
Simon stepped away from the scalpel he might have singled out and turned to lean against a counter, his arms crossing. "No. A doctor would not recommend running around without administering to the injury. Cleaning an injury is good, no matter how small. Don't forget to take food and water."