Add the dry ingredients to a large, non-reactive (glass or plastic) mixing bowl and whisk to combine.
Whisk the maple syrup, oil and 600g of water into the dry ingredients. The mixture should look and feel almost liquid then gradually thicken to become a thin muffin batter consistency as you whisk. If your batter is as described, you have added enough liquid. If it looks considerably thicker, add 50-100g more water and whisk to incorporate.
Cover the dough and allow to proof for 1 hour.
Grease and line your 23cm length X 10cm width X 10cm height (9 X 4 X 4 inch) Pullman Pan (I always use my USA Pullman pan in size small). Preheat your oven to 220C/428F.
When the dough has proofed for 1 hour, it should have a flat or slightly domed smooth top. If you run a spoon through it, the dough should be airy and light. See the section on proofing for an extensive guide to how the dough should look in each stage.
Decant the dough into your lined Pullman pan. Use a moistened hand to smooth and flatten down the top of the loaf. Cover the loaf without touching it (I use an inverted produce bag) and set aside to proof for 1-2 hours or until it gently domes above the top of the Pullman pan.
Once you're happy with the proof, place the loaf in the oven for 20 minutes. Check on it after 20 minutes - if it is already a golden brown, turn the oven down to 200C/400F. If it is a pale blond, continue to cook the loaf at 220C/428F for an additional 25-30 minutes.
Once the loaf is cooked, allow it to cool in the Pullman pan for 15 or so minutes. Gently remove it from the pan and set it on a cooling rack to cool completely before slicing. Slices can be stored in an airtight container in the fridge and can also be frozen and defrosted.