Cumberland had a fairly complicated beakhead....
For these, I rough sketched the needed parts and cut them out.
Once cut out, with matching pieces held together between my fingers, I sand them to shape. Concave curves are best done with the old "sandpaper around a round stick" trick.. in this case, my larger exacto.
Here is a trick to get some curves in your wood... if you cut a long piece perpendicular to the grain, you can then roll something over it with some pressure and compress the and it will curl automatically... sort of like a rolling pin. Be careful not to press too hard or you will crush the wood beyond its ability to hold together!