been poisoned over a long period of time. From what you told me, it sounds like this Oakes fellow was only sick for a few days, so I didnât expect to see any traces of long-term exposure.â
âHow long would it have to be going on before youâd find that?â Gino asked.
Frank looked at him in surprise, but Wesley was already responding. âA few weeks at least. Then Iâd find it in the liver and kidneys. If it was longer, say a month or more, then I could find it in the fingernails and hair.â
âIn the fingernails?â
âYeah, there would be lines. The hair is the same, except thereâs no lines.â
Gino frowned. âHow could somebody be taking arsenic for weeks or months and not die?â
âSmall amounts of arsenic will just make you sick. It builds up in the body over time, though, and eventually the organs begin to fail.â
âWhy would somebody give a person a dose too small to kill them, though?â
Wesley grinned, obviously enjoying the conversation. âYouâd have to ask that âsomebody,â but maybe they arenât sure how much would be a fatal dose, so they donât give the victim enough at first. Or maybe the person has a tolerancefor it. Some people do, and the amount that would kill me in an hour might only make you a little sick.â
âOr,â Frank said, glad to see his new assistant was curious but wanting to move the interview along, âthe killer might want it to look like the victim had some mysterious illness the doctors couldnât cure and eventually died of it.â
âOh, so no one would suspect poison,â Gino said.
âThatâs right. So was it arsenic?â Frank asked.
âOh yes. I did the Marsh test where you put the material on a zinc plate covered with sulfuric acidââ
âThis Marsh test,â Frank interrupted him, not interested in the details. âIs it something thatâs scientifically official?â
âYou mean, would it be accepted in court?â
âI guess thatâs what I mean.â
âYes. Itâs been around since the thirties, and the test is good on even the smallest amount of arsenic. I was also able to test the contents of the catâs stomach, and I found arsenic there, too.â
Frank knew he shouldnât be pleased to hear that Charles Oakes had been poisoned. This meant a lot more heartache for the Oakes family. On the other hand, it also meant he didnât have to spend all his days sitting in his new house, listening to the workmen pounding away.
âIf someone was getting poisoned, though, wouldnât they notice the taste?â Gino asked.
âWith some poisons, yes, but arsenic doesnât have a taste.â
âSo it mightâve been put into anything he drank,â Frank said.
âYes or anything he ate. It can take some time to work, too. Some poisons cause an immediate reaction, but with arsenic, depending on how big the dose is, the victim can go anywhere from half an hour to a whole day before they start showing a reaction.â
âSo even though our victim first got sick when he was away from home, he mightâve gotten poisoned there,â Frank said.
âYes, but from what we know about the milk and the dead cat, it looks like he got the final, fatal dose at home the night he died,â Wesley said.
Frank told Wesley where to send his bill, and he and Gino stepped out onto the sidewalk and the noticeably fresher air.
âHow does he stand the stench?â Gino asked.
âHe probably doesnât even smell it anymore.â
âWhat do we do now?â
âWell, Iâve got to go tell Mr. Oakes that his son was murdered.â
âCan I go with you?â
Frank hated to dampen his enthusiasm, but he couldnât bring a stranger to the Oakes house, at least not yet. âI want to see Oakes alone. Thereâs no telling how heâll take the