Complex sentence: However, with the rise of Baltimore and Annapolis, Joppa declined as a port, and was slowly abandoned, until by 1815 all the remained were ruins and the surviving Rumsey Mansion.
Split into simpler sentences: However, with the rise of Baltimore and Annapolis, Joppa declined as a port, and was slowly abandoned. By 1815 all the remained were ruins and the surviving Rumsey Mansion.