This place can be daunting as it has a tremendous amount of data. And, its index system is archaic; especially the legal portions which I swear were deliberately made confusing to frustrate the lay person. It takes time to get the hang of the place but the staff is usually helpful, especially if you have done some preparation and have specific questions. However, like many archives, it can treat genealogists with (sometimes deservedly) less concern than historians. Make very careful notes as to what you’ve done or you’ll end up duplicating your work. for more click here