eleven o’clock
One , two , three , go ! '' Tuppence 's little thumb ripped open the envelope , and she extracted the contents . `` DEAR SIR , `` Referring to your advertisement in this morning 's paper , I may be able to be of some use to you . Perhaps you could call and see me at the above address at eleven o'clock to-morrow morning . `` Yours truly , `` A. CARTER . '' `` 27 Carshalton Gardens , '' said Tuppence , referring to the address . `` That 's Gloucester Road way .