written the solved code into my knapsack.
For once, I couldnât wait for cemetery duty that afternoon so that I could share my results with Pascal and Merrilee.
âHey,â I said as soon I got to the iron gate.
Pascal and Merrilee had already arrived.
âI solved the code,â I boasted.
âWe did, too,â Merrilee said. âTrevor Tower keeps secrets, twenty-eight, thirty-four, eighteen.â
âOh,â I said, a bit deflated.
âSo what do you think it means?â Pascal asked. âWe already know itâs not the title of another mystery book.â
âThe other codes. Did they have numbers?â I asked Merrilee.
âNo,â she said. âThey didnât.â
âAnd you donât know who Trevor Tower is?â I asked.
âNo idea,â Merrilee said. âBut heâs not an author. I checked that out at the library, too. So this is definitely the last code to solve.â
âTrevor Tower keeps secrets,â I repeated. âTwenty-eight, thirty-four, eighteen.â
âHere comes the Brigade,â Merrilee reported.
We all turned to watch the trio navigate the crosswalk and plow through the gate. They carried clipboards and, for the first time, buckets.
âWhat do you think weâll be doing today?â Pascal asked dryly. âSurely not cleaning gravestones, even though thatâs what I thought we had signed up to do.â
âGood afternoon,â Creelman said when the Brigade had assembled in front of us. âTodayâs lesson: cleaning gravestones.â
âReally? Thatâs great!â Pascal exclaimed. âBut before we begin, do you know Trevor Tower?â
Creelman frowned. He set down his bucket and flipped through sheets of paper on his clipboard. Preeble and Wooster did the same.
âNo,â Creelman said. âHeâs not listed as buried here. Why are you asking about Trevor Tower?â Creelman inquired reluctantly.
Merrilee shot Pascal a warning look.
âNo reason,â Pascal said, but the way he kept bouncing from foot to foot told the entire Brigade otherwise.
Creelman scowled while he worked out whether to pursue his line of questions, move on to the lesson of the day or go for a cigarette.
âAs I was saying,â Creelman finally continued, âtoday weâre cleaning gravestones.â
Pascal and Merrilee fell into a silent line beside me.
âThe first thing you must figure out is what type of material you need to clean off the gravestone.â
Creelman held up his hand and began to count down on his fingers.
âThere are five common materials that plague markers. Soot. Dirt. Organics such as lichens and moss. Stains caused by metal or oil. And salt.â
Creelman picked up his bucket.
âMost of our cleaning will be to remove organics.â
This time, I dared to ask a question.
âWhy are lichens and moss a problem for stone?â
âMoss stains, and its root system pries stone apart. Lichens hold water on the stone, delaying evaporation. This makes the stone prey to frost damage.â
I nodded. I had no idea moss and lichen could be so evil.
âIn this cemetery, we use the least aggressive cleaning method along with good clear water. And we always clean from the bottom up. This avoids stains from streaking down on the area youâve just cleaned. Now, grab your buckets.â
The Brigade handed the buckets to us.
âEach bucket has a set of rubber gloves, a sponge and a soft bristle brush. Put the gloves on and go fill your buckets from that spigot,â Creelman said, pointing his cane to a nearby tap that the groundskeepers used for water. âThen select a gravestone from these three rows. Weâll come by with a cleaner, depending on the type of material youâll need to remove.â
We went to fill our buckets, then wandered among the rows to pick a gravestone. I chose a slate one that belonged to a man who