A letter from a jail cell   Dear Father, the River, whose stomach was cut open, has declared war on our tiny house on the bank, hasn’t she? Right in front of the house you must be looking out for someone who will help you with embankment poles to straighten the river, to fill her holes with sandbags. In the murky water, which rises like a bamboo lance, you must be gazing at the sesame plantation — laden with fruits ready for harvest. You must be thinking a fistful of rice in your mouth is about to be fingered…