should destroy those crops by means of his own troops.  He should destroy all the bridges over the rivers in his kingdom.  He should bale out the waters of all the tanks in his dominions, or, if incapable of baling them out, cause them to be poisoned.  Disregarding the duty of protecting his friends, he should, in view of both present and future circumstances, seek the protection of the ruler of another kingdom who may happen to be the foe of his foe and who may be competent to deal with his foe on the field of battle.[219] He should destroy all the smaller forts in his kingdom.  He should also cut down all the smaller trees excepting those that are called Chaitya.[220] He should cause the branches of all the larger trees to be lopped off, but he should not touch the very leaves of those called Chaitya.  He should raise outer ramparts round his forts, with enclosures in them, and fill his trenches with water, driving pointed stakes at their bottom and filling them with crocodiles and sharks.  He should keep small openings in his walls for making sallies from his fort, and carefully make arrangements for their defence like that of the greater gates.[221] In all his gates he should plant destructive engines.  He should plant on the ramparts (of his forts) Sataghnis and other weapons.  He should store wood for fuel and dig and repair wells for supply of water to the garrison.  He should cause all houses made of grass and straw to be plastered over with mud, and if it is the summer month, he should, from fear of fire, withdraw (into a place of safety) all the stores of grass and straw.  He should order all food to be cooked at night.  No fire should be ignited during the day, except for the daily homa.  Particular care should be taken of the fires in smithies and lying-in rooms.  Fires kept within the houses of the inhabitants should be well covered.  For the effectual protection of the city, it should be proclaimed that condign punishment will overtake the person who lights fires by the day time.  During such times, all beggars, eunuchs, lunatics, and mimes, should, O foremost of men, be driven out of the town, for if they are permitted to remain, evil will follow.  In places of public resort, in tirthas, in assemblies, and in the houses of the citizens, the king should set competent spies.[222] The king should cause wide roads to be constructed and order shops, and places for the distribution of water, to be opened at proper stations.  Depots (of diverse necessaries), arsenals, camps and quarters for soldiers, stations for the keeping of horses and elephants, encampments of soldiers, trenches, streets and bypaths, houses and gardens for retirement and pleasure, should be so ordered that their sites may not be known to others, O Yudhishthira.  A king who is afflicted by a hostile army should gather wealth, and store oil and fat and honey, and clarified butter, and medicines of all kinds, and charcoal and munja grass, leaves, arrows, scribes and draftsmen,