I got 373000 hits in 0.22 seconds when I did my search. (Pete Rose, Ty Cobb, take a seat) The Dropbears site was the best I could find. I went to the public library and found that our copy of "The Seven Pillars..." is out/gone. I also found a few things at Google that I wasn't looking for. What I was hoping for was: either there is a CB500 collector out there with the magazine, or maybe an Englishman who knows a lot more about Lawrence than I do.
"Boa is a top-gear machine, as sweet in that as most single-cylinders in middle. I chug lordlily past the guard-room and through the speed limit at no more than sixteen. Round the bend, past the farm, and the way straightens. Now for it. The engine's final development is fifty-two horsepower. A miracle that all this docile strength waits behind one tiny lever for the pleasure of my hand."