Yes, you are correct sir.  But typical of the english language there are exceptions to this rule. 
  
"I'll see you in an hour" as oppose to "do you have a handkerchief?" or "you don't have a hope in hell". 
  
I believe the "h" rule only works sometimes but not always. 
		
	
		
		
		
		
		
	
		
		
	
	
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