The following is extracted from Hart's Rules, which is the authority according to Fowler's Modern English Usage as regards the writing of numbers...
"Numbers should be in words if less than 100 and if not within a specific reference, measurement, date, list or table or part of statistical data generally (e.g. the tenth century; a late-tenth-century manuscript; on twenty-six occasions). Otherwise they should be in figures."
So, page 26 is a specific reference...16 feet is a measurement...October 13th is a date...3 is the third heading in a list starting from 1...12 deaths in every 100 is statistical data and all of these should be in figures, not words. Otherwise, they should be written out as words as per the example, "on twenty-six occasions" suggested above.