I have to ask, is one of the characters called "Hum", or...? What is the deal with the "hum" there? Is it someone saying ふむ? (If so, dear lord, that translation.)
That "Hum..." means "Hmm...". Which means it could have been a typo or just a weird spelling. I accidentally use "hum" rather often, too, because that's how it is in my native tongue.