Sentence:  Tea's directly after locking-up, you see," said East, hobbling along as fast as he could, "so you come along down to Sally Harrowell's; that's our School-house tuck-shop—she bakes such stunning <WSD>murphies</WSD>—we'll have a penn'orth each for tea; come along, or they'll all be gone." 
Meaning of the word marked with <WSD> tags:  An Irish or white potato.