layer at (0,0) size 800x600
  RenderView at (0,0) size 800x600
layer at (0,0) size 800x307
  RenderBlock {HTML} at (0,0) size 800x307
    RenderBody {BODY} at (8,16) size 784x275
      RenderBlock {P} at (0,0) size 784x21
        RenderText {#text} at (0,0) size 275x21
          text run at (0,0) width 275: "These <h1>s should all be left-aligned:"
      RenderBlock {H1} at (0,42) size 784x48 [border: (3px solid #FF0000)]
        RenderText {#text} at (3,3) size 111x42
          text run at (3,3) width 111: "sample"
      RenderBlock {H1} at (0,111) size 326x48 [border: (3px solid #FF0000)]
        RenderText {#text} at (3,3) size 111x42
          text run at (3,3) width 111: "sample"
      RenderBlock {P} at (0,180) size 784x21
        RenderText {#text} at (0,0) size 313x21
          text run at (0,0) width 313: "These <p>s should be (and are) left-aligned:"
      RenderBlock {P} at (0,217) size 784x21
        RenderText {#text} at (0,0) size 52x21
          text run at (0,0) width 52: "sample"
      RenderBlock {P} at (0,254) size 160x21
        RenderText {#text} at (0,0) size 52x21
          text run at (0,0) width 52: "sample"