Complex sentence: The next day, "Basilisk" was in company with and when they found three praams, seven brigs and 15 luggers off Cap Griznez which bore up to the westward keeping close inshore under cover of the batteries and horse artillery that followed them along the beach.
Split into simpler sentences: The next day, "Basilisk" was in company with and when they found three praams, seven brigs and 15 luggers off Cap Griznez. The French convoy bore up to the westward keeping close inshore under cover of the batteries and horse artillery that followed them along the beach.