The garments themselves may be termed "vintage", but their design is based on aesthetic elements that, to my mind, are classics and therefore, timeless.
Author: Sophia Takes Five
What Edwardians Knew About Aging and Gluten
A few pointers on the link between longevity and food from an illustrated 1907 article.
Resources for Pattern Drafting, Sewing, and Embellishments
I always find something to be gleaned from the combined experience of the curators, seamstresses, needleworkers and stylists who came before me, and this list of books and other resources are a good example.
Sewing Vintage & Illustrated Stories 