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 reflection, was  induced  to  abandon  those  chemical  
 agencies,  on  which  he  had  once  relied—of  the  
 newly-discovered  metals  of  the  earth,  the  alkalis  
 and  the pyrites—and,  in  lieu  of  them,  to  adopt  a  
 strong opinion,  amounting  almost  to  a  conviction,  
 of the  existence  of a  fluid  central  fire  “  in  the  laboratory  
 of nature .?  ”  But  a truce  to  all  speculation,  
 which  leads to  little  or nothing  that  is  satisfactory. 
 Just  as  1  was  on  the  eve  of departure from Liverpool, 
   1  received  a  letter  from  my  father,  inclosing  
 one  to  him  from Mr. Murchison  of the Geoloogical 
 Society,  of which  the  following  is  an  extract: — 
 “  l l t h   June,  1834. 
 “ 1  have  for  some  time  intended  to  call  on  you  
 to  request  you  to  mention  to  your  son,  who  is  
 going  to  Iceland,  how  much  we  geologists  desire  
 that  he  should  furnish  us,  upon  his  return,  with  
 some correct  information  respecting  a  very  singular  
 accident,  an  account  of which  I  received  from  Lord  
 Stuart  de  Rothsay.  When  Lord  Stuart  was  in  
 Iceland  last  autumn,  one  of  the  horses of  his  followers  
 was  lost,  and  his  disappearance  never  cmdd  
 be  accounted  for.  Since  his  return  to  England his  
 Lordship  had  a  letter  from  the  Governor  of  Iceland, 
   acquainting  him with  the  extraordinary  fact,  
 that  the  bones  o f  the  said  horse  had  been  ejected  
 from the  Geysers ;  into which  it  is  therefore  clear  
 he  had  fallen  unperceived  by  the attendants. 
 “ If this  be  not  a  fable,  it  would  be  very  desi-■ 
 rahle  th a t Mr.  Barrow,  Junior,  should  bring  home  
 any portion  of  these  bones which  he may  be  able  
 to  procure,  and  present  them  to  the  Geological  
 Society,  there  to  remain  as  evidence  of the  eflfects  
 produced  upon  animal  and  bony  matter  when  
 boiled  in  a  subterranean  cauldron  of liquid  silica.” 
 1  lost  no  time,  on  our  arrival,  in  communicating  
 the  contents  of  this  letter  to  Mr.  Krieger,  who  
 told me  it was  all  a mistake ;  th a t  he  only  said  the  
 horse  had  tumbled  into  one  of  the  springs,  and  
 that  part  of  its  leg  and  hoof had been  seen  by  a  
 peasant.  It  appears,  indeed,  that he  scarcely  said  
 so  much :  the  letter  of the  Governor,  an  extract of  
 which Lord Stuart has kindly communicated, merely  
 says—“ On  a]  trouvfe  un  pied  du  pauvre  cheval  
 que  vous  avez  perdu  auprès  du Geiser;  il  a  été  
 abîmé  dans  l’eau  bouillante.”  1  was  quite  satisfied, 
   however, with  the  Governor’s  answer,  that  it  
 “ was  not  a  fable,”  and  prepared  accordingly  to  
 make  further  inquiries. 
 We  happened  to  enter  upon  the  plain  of the  
 Geysers just  as  a Danish  gentleman of the name  of  
 Smith  and  his  party  were  leaving  it.  Being  at  
 Reikiavik  when  the  subject  was  mentioned,  he  
 pointed  out  to me, as at  least  a curiosity,  the boiling  
 mud pit  into which  Lord  Stuart’s  horse  had  fallen,  
 and  which was  shown  to  him  by  the  very  guide  
 Avho  had  accompanied  his  Lordship,  and was  now  
 with  the  party.  I t was  one  of those  cauldrons  of a