Black Watch officer's in the Boer war

[MichiganKyle]

I think, looking at the photos, that many were horsehair, yet there was a different fashion or style of how the bottom should look.

This is a little off-topic, but I've been wondering: how the heck do you keep your vast stores of photos/paintings/illustrations organized so you can find photos on a specific particular topic like this and your other "photo archive" responses? They're very helpful for illustrating differences across history. But...how!?