You are lucky to have such a great resource -- However if you have the original chart (and if you can determine that it has not faded) you would be better off having a paint store custom mix a color to match rather than going with close "matches" from a standard set of colors, especially since what a lot of paint companies call historic colors are what they think their customers will consider historic and what will sell and not based on research. Some local and state historic societies do have period historic paint charts in their collection and that might be one way to check on the condition of your chart as well as to see what other colors were available during that time.
Sorry for the delay in my reply we have been traveling, I had not thought about color matching and that is a great idea! Since I have the original document it is easy for me to take it to get color matched but my thought in providing the conversion to Benjamin Moore was to help others since they may not have access to the color chart for color matching. I may try and find a paint store with color matching and see if they could give me the combination so I could share that.... Interesting idea will be interesting to see if a paint store would match the color and share the mix instructions.
I'm sorry to tell you that this brochure is practically useless to find the exact historic colors. Matching paint colors to print colors is never accurate. Paint pigments vs printing's CMYK are totally different color systems. In fact it is almost impossible to match paint colors brand to brand because they don't have the same base colors. Forget that computer matching, it is totally bogus. I speak from 30 years experience. It is like when you try to print a picture from your computer screen on you printer. Close maybe but no cigar.
Just look at the colors for stain. Stain will never look like that. Same goes for the other colors really. Best bet, if you like a color is to find a similar looking color that is not too bright because it will get out of hand if it is. You want a softer, muddier version of the color to make it behave on the walls. Also with most paint will be different from the color printed on the chip depending on the brand. Your use of Benjamin Moore is good as their printed colors are maybe the most accurate especially on the 4x6 samples.