very happy memory。〃
Harry cast his mind about for a happy memory。 Certainly； nothing that had happened to him at the Dursleys' was going to do。 Finally； he settled on the moment when he had first ridden a broomstick。
〃Right；〃 he said； trying to recall as exactly as possible the wonderful； soaring sensation of his stomach。
〃The incantation is this 〃 Lupin cleared his throat。 〃Expecto patronum！〃
〃Expecto patronum； 〃 Harry repeated under his breath； 〃expecto patronum。〃
〃Concentrating hard on your happy memory？〃
〃Oh yeah 〃 said Harry； quickly forcing his thoughts back to that first broom ride。 〃Expecto patrono no； patronum sorry expecto patronum； expecto patronum〃
Something whooshed suddenly out of the end of his wand； it looked like a wisp of silvery gas。
〃Did you see that？〃 said Harry excitedly。 〃Something happened！〃
〃Very good；〃 said Lupin； smiling。 〃Right； then ready to try it on a dementor？〃
〃Yes；〃 Harry said； gripping his wand very tightly； and moving into the middle of the deserted classroom。 He tried to keep his mind on flying； but something else kept intruding。。。。 Any second now； he might hear his mother again。。。 but he shouldn't think that； or he would hear her again； and he didn't want to。。。 or did he？
Lupin grasped the lid of the packing case and pulled。
A dementor rose slowly from the box； its hooded face turned toward Harry； one glistening； scabbed hand gripping its cloak。 The lamps around the classroom flickered and went out。 The dementor stepped from the box and started to sweep silently toward Harry； drawing a deep； rattling breath。 A wave of piercing cold broke over him
〃Expecto patronum！〃 Harry yelled。 〃Expecto patronum！ Expecto 〃
But the classroom and the dementor were dissolving。。。。 Harry was failing again through thick white fog； and his mother's voice was louder than ever； echoing inside his head 〃Not Harry！ Not Harry！ please I'll do anything！〃
〃Stand aside。 Stand aside； girl！〃
〃Harry！〃
Harry jerked back to life。 He was lying flat on his back on the floor。 The classroom lamps were alight again。 He didn't have to ask what had happened。
〃Sorry；〃 he muttered； sitting up and feeling cold sweat trickling down behind his glasses。
〃Are you all right？〃 said Lupin。
〃Yes。。。〃 Harry pulled himself up on one of the desks and leaned against it。
〃Here 〃 Lupin handed him a Chocolate Frog。 〃Eat this before we try again。 I didn't expect you to do it your first time； in fact； I would have been astounded if you had。〃
〃It's getting worse；〃 Harry muttered； biting off the Frog's head。 〃I could hear her louder that time and him Voldemort
Lupin looked paler than usual。 ；
〃Harry； if you don't want to continue； I will more than understand 〃
〃I do！〃 said Harry fiercely； stuffing the rest of the Chocolate Frog into his mouth。 〃I've got to！ What if the dementors turn up at our match against Ravenclaw？ I can't afford to fall off again。 If we lose this game we've lost the Quidditch Cup！〃
〃All right then。。。 〃 said Lupin。 〃You might want to select 'other memory； a happy memory； I mean； to concentrate on。。。。 That one doesn't seem to have been strong enough。。。。〃
Harry thought hard and decided his feelings when Gryffindor had won the House Championship last year had definitely qualified as very happy。 He gripped his wand tightly again and took up his position in the middle of the classroom。
〃Ready？〃 said Lupin； gripping the box lid。
〃Ready；〃 said Harry； trying hard to fill his head with happy thoughts about Gryffindor winning； and not dark thoughts about what was going to happen when the box opened。
〃Go！〃 said Lupin； pulling off the lid。 The room went icily cold and dark once more。 The dementor glided forward； drawing its breath； one rotting hand was extending toward Harry …
〃Expecto patronum！〃 Harry yelled。 〃Expecto patronum！ Expecto Pat 〃
White fog obscured his senses。。。 big； blurred shapes were moving around him。。。 then came a new voice； a man's voice； shouting； panicking
〃Lily； take Harry and go！ It's him！ Go！ Run！ I'll hold him off 〃
The sounds of someone stumbling ftom a room a door bursting open a cackle of high… pitched laughter
〃Harry！ Harry。。。 wake up。。。。〃
Lupin was tapping Harry hard on the face。 This time it was a minute before Harry understood why he was lying on a dusty classroom floor。
〃I heard my dad；〃 Harry mumbled。 〃That's the first time I've ever heard him he tried to take on Voldemort himself； to give my mum time to run for it。。。。〃
Harry suddenly realized that there were tears on his face mingling with the sweat。 He bent his face as low as possible； wiping them off on his robes； pretending to do up his shoelace； so that Lupin wouldn't see。
〃You heard James？〃 said Lupin in a strange voice。
〃Yeah。。。〃 Face dry； Harry looked up。 〃Why you didn't know my dad； did you？〃
〃I I did； as a matter of fact；〃 said Lupin。 〃We were friends at Hogwarts。 Listen； Harry perhaps we should leave it here for tonight。 This charm is ridiculously advanced。。。。 I shouln't have suggested putting you through this。。。。〃
〃No！〃 said Harry。 He got up again。 〃I'll have one more go！ I'm not thinking of happy enough things； that's what it is。。。。 Hang on。。。。〃
He racked his brains。 A really； really happy memory。。。 one that he could turn into a good； strong Patronus。。。
The moment when he'd first found out he was a wizard； and would be leaving the Dursleys for Hogwarts！ If that wasn't a happy memory； he didn't know what was。。。。 Concentrating very hard on how he had felt when he'd realized he'd be leaving Privet Drive； Harry got to his feet and faced the packing case once more。
〃Ready？〃 said Lupin； who looked as though he were doing this against his better judgment。 〃Concentrating hard？ All right go！〃
He pulled off the lid of the case for the third time； and the dementor rose out of it； the room fell cold and dark
'EXPECTO PATRONUM！〃 Harry bellowed。 〃EXPECTO PATRONUM！ EXPECTO PATRONUM！ 〃
The screaming inside Harry's head had started again except this time； it sounded as though it were ing from a badly tuned radio softer and louder and softer again and he could still see the dementor it had halted and then a huge； silver shadow came bursting out of the end of Harry's wand； to hover between him and the dementor； and though Harry's legs felt like water； he was still on his feet though for how much longer； he wasn't sure
〃Riddikulus！〃 roared Lupin； springing forward。
There was a loud crack； and Harry's cloudy Patronus vanished along with the dementor； he sank into a chair； feeling as exhausted as if he'd just run a mile； and felt his legs shaking。 Out of the corner of his eye； he saw Professor Lupin forcing the boggart back into the packing case with his wand； it had turned into a silvery orb again。
〃Excellent！〃 Lupin said； striding over to where Harry sat。 〃Excellent； Harry！ That was definitely a start！〃
〃Can we have another go？ Just one more go？〃
〃Not now；〃 said Lupin firmly。 〃You've had enough for one night。 Here 〃
He handed Harry a large bar of Honeydukes' best chocolate。
〃Ea