Walker’s enigmatic note tells Juliette not to fear and praises Supply, which she understands as a reference to its people.
Walker’s message tells Juliette that the truth is a joke and says they are good in Supply. She repeats it to herself while being fitted for her cleaning.
Walker hopes the note reached her in time and eased her fear. Its instruction to have no fear stays with her, and she understands the praise of Supply as referring to the people who work there.
It is Walker’s message of reassurance to Juliette, carrying a reference to Supply that she interprets as praise of its people.