Possible Clues:

• Big weapons British note missing from Welsh town
• Skill I'll use, on the Eastern railway, to move heavy guns
• The big guns
• Large guns for army in land war
• Ray is about to keep the ship on course for 4 across
• Is Ray about to be a farmer, perhaps, or a cannon, by the sound of it
• Magazine items
• Regiment finds main road badly congested
• Major road blocked by hostile guns
• Weapons badly loaded into vessel