Not to disagree with brother David612, but rather to offer some context that I think a lot of American Masons miss;
Preston wrote most of the lectures we are now familiar with (Webb basically edited Preston's work). You know the very long parts that you take a deep breath before reciting? Those were Preston/Webb. For one thing, Preston's Illustrations of Masonry was written about Freemasonry, not as the ritual itself. It's freely available online and I'd encourage you to look through it to see not only what is the same and different from what we know today, but also the context in which it was written. Personally, I think it's a long stretch to say they wrote the ritual, but rather, they commentated on the ritual and their writings were later incorporated into the ritual to better explain it. I don't believe that was ever Preston's intention, Webb is a different story.
Prior to this, Anderson's Constitutions outlined a lot of Old Charges which included a lot of the rules and obligations we see in our current degrees, but in different verbiage. This was also the time that the Grand Lodge was trying to at least somewhat standardize the rituals. We don't really know what the degrees looked like around this time or before. We have catechisms from earlier and some of them, like the Edinburgh House Register, do mention the candidate going through a series of events similar to floorwork. Other than that, the early catechisms are about the symbols of the fraternity, so we don't know what, if any, degree work there was. It's possible that it consisted solely of swearing a short oath on the constitutions and then listening to the catechism spoken by others, or, it could've been as elaborate as what we have today, we simply don't know.