Isabel De Nyse Conover, A Complete Course in Dressmaking (1922)
“ In blouse making, too, you can use a block pattern to good advantage. If you have a good foundation pattern of a plain waist, it will speed up your work in copying various styles. See to it that your foundation pattern is a good fitting one, that it is cut high in the neck and with a regulation armhole. Copy your foundation pattern in a stiff paper without seams or hem allowance. You can make any variation when you are copying your styles. Hem allowances and seams are apt to be confusing. ”
