The forum requires that you state your thread within the context that it is used. Could you furnish the context for this one?
Also, you often find the article ending with a consonant before the word beginning with "h." However, the actual rule is that you use the article which best
ellides with the noun. Eg., Use a history to describe a past event. Not, use an history to describe a past event. Eg., His recollection was an hallucination. Not, his recollection was a hallucination.