This was the first piece I did using the “encajar” method, which means to encase. I’ve also heard of it as the “envelope” method too, but I prefer encajar – it just feels nice when you say it! It is an approach to drawing where you start by boxing in your subject: that is, to encase it in a box of the correct proportions, and then carve away the angles. Always working with straight lines, which are easier to measure with the eye than curved, you can then place your landmarks accurately before moving on to defining form with contour lines and value.
Annoyingly, I didn’t take photos with the encajar lines in place!