Aristophanes of Byzantium needed to complete each fragment of text when reading aloud (not to comply with rules of grammar, which were not applied to punctuation marks until thousands of years later). For a short passage (a "komma"), a "stigmḕ mésē" dot was placed mid-level (·). This is the origin of the modern comma punctuation mark, and its name. For a longer passage (a "kolon"), a "hypostigmḗ" dot was placed level with the bottom of the text (.), similar to a modern colon or semicolon, and for very long pauses ("periodos"), a "stigmḕ teleía" point near the top of the line of text
Punctuation of English is strict about not including terminal punctuation within the quotation marks unless it was also found in the quoted material. Some writers conflate logical quotation and the common British style (which actually permits some variation, such as replacement of an original full stop with a comma or vice versa, to suit the needs of the quoting sentence, rather than moving the non-original punctuation outside the quotation marks). For example, "The Chicago Manual of Style", 14th ed.: "The British style is strongly advocated by some American language experts. Whereas there clearly is some risk with question marks and exclamation points, there