Researching the History of a Colt 1901 Handgun: A Guide

Question
Rick, I am trying to find out where to go to look up a gun's history.  It doesn't seem like any of the "experts" want to delve into this topic.  Do you know what would be a good place to start.  The handgun in question is a Colt, says US Army 1901 on the butt.  I don't want to waste your time with more detail.  It is a family heirloom.  Thank you in advance if you have any suggestions for how to research this item. Sandra

Answer
Is it a revolver or auto?  Are you sure it is not 1911?  I need more info to try and help.  Here is a link to a revolver to see if it looks like yours?

http://www.gunsamerica.com/911257742/Guns/Pistols/Colt-Double-Action-Revolvers-P...