'Is he? Dunno. All I know right now is 'Roof! Roof! Roof!'--sounds like a dog when you say it like that, doesn't it? 'Roof! Roof! Roof!''
I shook my head and started down the shaky ladder.
'Look at yourself!' Ned said. 'You're covered with tar.'
'Like a roof,' I said, getting a look at my filthy hands and my dress. Ned hooted with laughter and I managed a pathetic grin.
I could cheerfully have fed him to the pigs.
'It won't come off, you know. You'll still have it plastered all over you when you're an old lady.'
I wondered where Ned had picked up this rustic folklore--it was probably from Tully. I knew for a fact that Michael Faraday had synthesized tetrachloroethene in the 1820s by heating hexachloroethane and piping off the chlorine as it decomposed. The resulting solvent would remove tar from fabric like stink. Unfortunately--much as I should like to have done--I hadn't the time to repeat Faraday's discovery. Instead, I would have to fall back on mayonnaise, as recommended in
'Perhaps Mary would know. Is she somewhere about?'
I didn't dare barge in and ask Tully about a paying guest. To be perfectly honest, I was afraid of him, although it's difficult to say why with any certainty.
'Mary? She's taken the week's wash to the laundry, then she'll most likely be off to church.'
Church! Baste me with butter! I'd forgotten all about church. Father would be going purple!
'Thanks, Ned,' I shouted, grabbing Gladys from the bicycle stand. 'See you!'
'Not if I see you first.' Ned laughed, and like Santa Claus, turned to his work.
As I had feared, Father was standing at the front door glaring at his watch as I slid to a stop.
'Sorry!' I said. He didn't even bother asking.
Through the open door I flew and into the front hall. Daffy was sitting halfway up the west staircase with a book open in her lap. Feely wasn't down yet.
I charged up the east staircase to my bedroom, threw on my Sunday dress like a quick-change artist, scrubbed my face with a cloth, and within two minutes by the clock--barring a bit of tar on the end of my pigtails--I was ready for morning prayer.
It was then that I remembered the chocolates. I'd better retrieve them before Mrs. Mullet began to concoct her dreadful Sunday ices. If I didn't, there would be a host of cheeky questions to answer.
I tiptoed down the back stairs to the kitchen, and peered around the corner. Something nasty was just coming to the boil on the back of the cooker, but there was no one in sight.
I retrieved the chocolates from the ice cabinet and was back upstairs before you could say 'Jack and the Beanstalk.'
As I opened my laboratory door, my eye was arrested by a glint of glassware, which was reflecting a wayward sunbeam from the window. It was a lovely device called a Kipp's apparatus: one of Tar de Luce's splendid pieces of Victorian laboratory glass.
'A thing of beauty is a joy forever,' the poet Keats had once written--or so Daffy had told me. There couldn't be a shred of doubt that Keats had written the line while contemplating a Kipp's apparatus: a device used to extract the gas resulting from a chemical reaction.
In form, it was essentially two clear glass balls mounted one above the other, a short tube connecting them, with a stoppered glass gooseneck projecting from the top globe, and a vent tube with a glass stopcock sticking out of the bottom one.
My plan took form instantly: a sure sign of divine inspiration. But I had only minutes to work before Father would come storming in to drag me down the stairs.
First, I took from a drawer one of Father's old razors--one I had nicked for an earlier experiment. I carefully slipped the faded ribbon from the chocolate box, turned it upside down, and made a careful, dead straight incision in the cellophane along the line where the ribbon had lain. A slit in the bottom and each end was all that was needed for the wrapping to open up like an oyster shell. Replacing it would be child's play.
That done, I carefully lifted the lid on the box and peered inside.
Perfect! The creams looked to be in pristine condition. I had suspected that age might have taken its toll--that opening the box might yield a sight similar to the one I had once seen in the churchyard when Mr. Haskins, the sexton, while digging a new grave, had accidentally broken through into another that was already occupied.
But then it had occurred to me that the chocolates, having been hermetically sealed--to say nothing of the preservatives that might have been added--might still seem fresh to the naked eye. Luck was on my side.
I had chosen my method because of its ability to take place at normal temperatures. Although there were other procedures that would have resulted in the same product, the one I selected was this: Into the bottom sphere of the Kipp's apparatus, I measured a quantity of ordinary iron sulfide. Into the top bulb, I carefully tipped a dilute sulfuric acid, using a glass rod to make sure that the liquid went straight into the target vessel.
I watched as the reaction began in the bottom container: a lovely chemical hubbub that invariably takes place when anything containing sulfur--including the human body--decomposes. When I judged it complete, I opened the bottom valve and let the gas escape into a rubber-stoppered flask.
Next came the part I loved best: Taking a large brass-bound glass syringe from one of Uncle Tar's desk drawers (I had often wondered if he used it to inject himself with a seven-percent solution of cocaine, like Sherlock Holmes), I shoved its needle through the rubber stopper, depressed the plunger, and then pulled it up again.
I now had a needle charged with hydrogen sulfide gas. Just one more step to go.
Sticking the needle through the rubber stopper of a test tube, I rammed the plunger down as hard as I could with both thumbs. Only fourteen atmospheric pressures were required to precipitate the gas into a liquid and, as I
