*receives Snape's message, reads over it, swears, and then sends the owl back to Derwent with a strongly worded (while vague on detail -- it's possible they've been lax about more than just what Snape has noticed) letter saying that if they're unable to follow instructions (requiring the whole order to come through at the same time means that you send everything fresh, and NOT that you assemble bits of the order early and hold them over until the rest is ready), he will not be using them again*
Severus,
Thank you for your note.
The damascene scalpels should have been in addition to the knives you'd requested. If you are missing anything in your suite of bronze, silver or (ordinary) steel knives, please advise.
Use your judgement with alternative (or local) suppliers for the salve. As for the other items, please hold off for now, as I have yet to discuss treatment with my patient, and I suspect there may be complications.
Best Regards, Sirius Black
*seals the parchment, and sends it off with the sparrow [from earlier]*