Loading multiple sprites from resources?

I load several graphics for my HUD from the resources folder so I can change out various graphics when they are needed, with a simple:

Code (CSharp):

1. thisTexture = Resources.Load<Texture>("HUD/MySprite");

But this requires to have each sprite/texture be one individual texture. If I try to have a sheet with several graphics on it and set the texture's sprite mode to multiple, I can't quite access any of these sprites from my script. I've tried every name and syntax that I can think of, but I can't get it to load.

How do I load a sprite from a sheet of sprites with the sprite mode set to multiple?