Sarah Gilbertson: [gasps] Mr. Pringle, Mr. Pringle! Lucy's covered in spots!
Lucy Selby: [gasps] Spots?
Sarah Gilbertson: Oh! Mr. Pringle, Mr. Pringle! So is Bill Thompson!
Bill Thompson: Oh!
Sarah Gilbertson: It looks like a case of black river fever to me.
Lucy Selby: [gasps, then cries]
Mr. Pringle: It's not black river fever, Sarah.
Postman Pat: It's probably chicken pox. Dr. Gilbertson told me Tom and Katy Pottage have got it.