innewvariouspartsoftheworld.Therewasalsoagreatdealofmachineryondisplay.ThemostwonderfulpieceofmachineryonshowwasNasmyth'ssteamhammer.Thoughinthosedays,travellingwasnotaseasyasitistoday,steamboatscarriedthousandsofvisitorsacrosstheChannelfromEurope.OnarrivinginEngland,theyweretakentotheCrystalPalacebytrain.Thereweresixmillionvisitorsinall,andtheprofitsfromtheexhibitionwereusedtobuildmuseumsandcolleges.Later,theCrystalPalacewasmovedtoSouthLondon.Itremainedoneofthemostfamousbuildingsintheworlduntilitwasburntdownin1936.Lesson81Escape脱逃Whenhehadkilledtheguard,theprisonerofwarquicklydraggedhimintothebushes.Workingrapidlyinthedarkness,hesoonchangedintothedeadman'sclothes.Now,dressedinablueuniformandwitharifleoverhisshoulder,theprisonermarchedboldlyupanddowninfrontofthecamp.Hecouldhearshoutinginthecampitself.Lightswereblazingandmenwererunninghereandthere:theyhadjustdiscoveredthataprisonerhadescaped.Atthatmoment,alargeblackcarwithfourofficersinsideit,stoppedatthecampgates.Theofficersgotoutandtheprisonerstoodtoattentionandsalutedastheypassed.Whentheyhadgone,thedriverofthecarcametowardshim.Themanobviouslywantedtotalk.Hewasratherelderlywithgreyhairandclearblueeyes.Theprisonerfeltsorryforhim,buttherewasnothingelsehecoulddo.Asthemancamenear,theprisonerknockedhimtothegroundwithasharpblow.Then,jumpingintothecar,hedroveoffasquicklyashecould.Lesson82Monsterorfish?是妖还是鱼？Fishermenandsailorssometimesclaimtohaveseenmonstersinthesea.Thoughpeoplehaveoftenlaughedatstoriestoldbyseamen,itisnowknownthatmanyofthese'monsters'whichhaveattimesbeensightedaresimplystrangefish.Occasionally,unusualcreaturesarewashedtotheshore,buttheyarerarelycaughtoutatsea.Sometimeago,however,apeculiarfishwascaughtnearMadagascar.Asmallfishing-boatwascarriedmilesouttoseabythepowerfulfishasitpulledontheline.Realizingthatthiswasnoordinaryfish,thefishermanmadeeveryeffortnottodamageitinanyway.Whenitwaseventuallybroughttoshore,itwasfoundtobeoverthirteenfeetlong.Ithadaheadlikeahorse,bigblueeyes,shiningsilverskin,andabrightre