The Committee of Secret Correspondence is one of those names that sounds like they should be on Double Secret Probation or something. However, when you look at their purpose, the name makes sense.
The Committee of Secret Correspondence was formed to seek out support from other nations. They reached out to France, Spain, and a few others to get supplies, food, munitions…pretty much anything they could get. Oftentimes they had to use a third party to give everyone plausible deniability.
And fortunately, their tactics were mostly successful.