Sorry to raise your hopes: Marlowe to Maidenhythe is a fictional scenario pack not based on anything that actually took place. Likewise, you won't find Norchester (the Siege of Norchester being my other ECW scenario pack) anywhere outside the pages of George Gently detective novel: something I discovered after the pack was published!
If it helps, all the places in Marlowe to Maidenhythe are real...and it's easy to imagine them full of pike and musket carrying troops!