No scrawling or scratching, or cross-hatching, or 'free' work of any sort.
All the cross-hatching was done with the triangle of 60 degrees and that of 90 degrees.
It may be known to be a sectional view by the cross-hatching or section lines.
Turner, the Rev. William, his opinion of cross-hatching, 562.
There is a maximum of outline-work, a minimum of shading and no cross-hatching.