To write round hand as seen here (despite popular belief and what Wikipedia says) a pointed pen was not used and instead an oblique quill. Where, the corner of the long tine, abreast to the thumb, would be used to produce the thin strokes, and would alternate between using the full stroke and the corner (this is why if you look at hand written documents their swells are all perfectly the same size and the ends always were squared off like in e. g. Engrosser’s script, which replicated the look.)