CSS Floating Divs At Variable Heights [duplicate]

Answer 1

Thanks to thirtydot, I have realised my previous answer did not properly resolve the problem. Here is my second attempt, which utilizes JQuery as a CSS only solution appears impossible:

    
        
        
        
    
          
        

            
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The only problem that remains for my solution is, what happens when a box is two-box-widths instead of just one. I'm still working on this solution. I'll post when complete.