Many publications (particularly of the self help variety) stressed the possibility of drawing fluently by means of a schematic system.Braun's figures are excellent but the reverse of the sequence looks even more attractive. The system is often connected to a Postal Education Pack which can be copied at home.
 

TOP ROW from Adolphe Armand Braun, Hieroglyphic or Greek method of Life Drawing Postal University/Batsford London 1916 first edition page size - 22 x 27cms

BOTTOM 01 and 03, from Lutz, Practical Graphic Figures, 1925

02 from Gerard de Leiresse, The Art of Painting 1778 - 18 x 24cms, oppos.p.13