All of the patterns in this book were taken from existing garments, so they are very historically accurate. Details on fabric, trim, and construction are included--as well as what type of corset was worn with each (very important!). I used one of the patterns to make a 1870's dress and it turned out wonderful--I made mock-ups of the bodice first to ensure fit, and had to make a number of alterations. The grid scale is easy to use. Seam allowances and alternate sizing is not included, so if your figure is extremely dissimilar to the original wearer of the gown, you might have trouble. These books show a few specific examples in great detail, so you should use it with other broader resources for ideas for alterations, materials, and accessories.