Did you see the specs on the 577 he was referring to? 650gr @ 1950fps... That was the NITRO EXPRESS load. The 450 of his day wasn't nearly as powerful and two loadings were commonly used - both Nitro and black powder.
Samuel Baker was speaking from experience in the context of his day - over a hundred years ago. EVERYONE knows bullets are superior today, but not THAT much better! There's a lotta' sissy types that think they can touch off a little Mach-5 smallbore at huge ranges and still take enormous game animals, and it's just NOT TRUE. The guys he described being killed were hunting dangerous game animals at close range. Cape Buff will run off and turn back to watch their backtrail. When an animal is charging, it's a whole 'nother ballgame and that's what Baker was trying to explain. You need a STOPPING GUN under those circumstances, and it takes enormous power to stop over a ton of buffalo, rhino or elephant or other dangerous game animal.
I strongly urge you to download his book "Wild Animals and Their Ways" and read the whole thing. It's quick reading and very entertaining. I bet you'll learn a thing or two as the rest of us have...
Did you know shooting animals in the KIDNEYS was once considered a very sure method of dropping an animal in its tracks? It can create more shock and disability than a heart shot sometimes.
BTW, these catalog pages are from the 1910-1912 H&H Catalog - a full 20 years after Baker wrote the lines above, at a time when rifles & cartridges were changing very rapidly... Notice the ballistics of the 450 Express below.
GOOD LUCK! [img]images/icons/wink.gif[/img]