\"Howdidyoudiscoverthat？\"heasked。
\"Dr。McLaneandItookthehandkerchieftoalaboratoryandthechemistfoundfromthenumberofparticlesofcapsulesinthehandkerchief，thatatleasttwocapsules—ordoubletheusualdose—hadbeencrushedbyTurnbullandthefumesinhaledbyhim;
withfatalresults。\"
\"Holdon，\"cautionedKent。\"Intheflurryofthemoment，Turnbullmayhaveaccidentallyputtwocapsulesinthehandkerchief，meaningonlytouseone。\"
\"Mr。Kent，\"thedetectivespokeimpressively，\"thatwasn’tTurnbull’shandkerchief。\"