The best part is, they didn't find any artillery, or ammunition. Some powder and other colonial stores, but the artillery, such as it was, had been hauled away and hidden in newly plowed furrows, then covered over by the action of plowing another furrow beside the first one. The Lobsterbacks marched right past the fields hiding the cannon. Smith, as fat as I am at least, got himself swarmed. Militia, alerted by Paul Revere and others sent on their own "midnight rides", marched toward Concord more quickly than the Brits coudl retreat back to Boston.
And sniped at from the woods for most of his hasty retreat as I recall.