were　alone　and　helpless；　tramping　on　in　the　darkness　over　an　unknown
  railroad　track　in　the　enemy's　country；　liable　on　the　one　hand　to　go
  tumbling　through　some　bridge　or　trestle；　and　on　the　other；　to
  possible　capture　or　death　at　the　hands　of　the　guerrillas　then
  infesting　these　mountains。　　Just　after　dark　we　came　to　a　little　cabin
  near　the　track；　where　we　made　bold　to　ask　for　water；　notwithstanding
  the　fact　that　to　disclose　ourselves　to　the　inmates　might　lead　to
  fatal　consequences。　　The　water　was　kindly　given；　but　the　owner　and
  his　family　were　very　much　exercised　lest　some　misfortune　might　befall
  us　near　their　house；　and　be　charged　to　them；　so　they　encouraged　us　to
  move　on　with　a　frankness　inspired　by　fear　of　future　trouble　to
  themselves。
  At　every　turn　we　eagerly　hoped　to　meet　the　hand…car；　but　it　never
  came；　and　we　jolted　on　from　tie　to　tie　for　eleven　weary　miles；
  reaching　Cowan　after　midnight；　exhausted　and　sore　in　every　muscle
  from　frequent　falls　on　the　rough；　unballasted　road…bed。　　Inquiry。
  developed　that　the　car　had　been　well　manned；　and　started　to　us　as
  ordered；　and　nobody　could　account　for　its　non…arrival。　　Further
  investigation　next　day　showed；　however；　that　when　it　reached　the　foot
  of　the　mountain；　where　the　railroad　formed　a　junction；　the　improvised
  crew；　in　the　belief　no　doubt　that　the　University　was　on　the　main　line
  instead　of　near　the　branch　to　Tracy　City；　followed　the　main　stem
  until　it　carried　them　clear　across　the　range　down　the　Crow　Creek
  Valley；　where　the　party　was　captured。
  I　had　reason　to　remember　for　many　a　day　this　foolish　adventure；　for
  my　sore　bones　and　bruised　muscles；　caused　me　physical　suffering　until
  I　left　the　Army　of　the　Cumberland　the　next　spring；　but　I　had　still
  more　reason　to　feel　for　my　captured　men；　and　on　this　account　I　have
  never　ceased　to　regret　that　I　so　thoughtlessly　undertook　to　rejoin　my
  troops　by　rail；　instead　of　sticking　to　my　faithful　horse。
  CHAPTER　XV。
  ORDERED　TO　OCCUPY　BRIDGEPORTA　SPYTHE　BATTLE　OF　CHICKAMAUGA
  GENERAL　THOMASTREATED　TO　COFFEERESULTS　OF　THE　BATTLE。
  The　Tullahoma　campaign　was　practically　closed　by　the　disappearance　of
  the　enemy　from　the　country　north　of　the　Tennessee　River。　　Middle
  Tennessee　was　once　more　in　the　possession　of　the　National　troops；　and
  Rosecrans　though　strongly　urged　from　Washington　to　continue　on；
  resisted　the　pressure　until　he　could　repair　the　Nashville　and
  Chattanooga　railroad；　which　was　of　vital　importance　in　supplying　his
  army　from　its　secondary　base　at　Nashville。　　As　he　desired　to　hold
  this　road　to　where　it　crossed　the　Tennessee；　it　was　necessary　to　push
  a　force　beyond　the　mountains；　and　after　a　few　days　of　rest　at　Cowan
  my　division　was　ordered　to　take　station　at　Stevenson；　Alabama；　the
  junction　of　the　Memphis　and　Charleston　road　with　the　Nashville　and
  Chattanooga；　with　instructions　to　occupy　Bridgeport　also。
  The　enemy　had　meanwhile　concentrated　most　of　his　forces　at
  Chattanooga　for　the　twofold　purpose　of　holding　this　gateway　of　the
  Cumberland　Mountains；　and　to　assume　a　defensive　attitude　which　would
  enable　him　to　take　advantage　of　such　circumstances　as　might　arise　in
  the　development　of　the　offensive　campaign　he　knew　we　must　make。　　The
  peculiar　topography　of　the　country　was　much　to　his　advantage；　and
  while　we　had　a　broad　river　and　numerous　spurs　and　ridges　of　the
  Cumberland　Mountains　to　cross　at　a　long　distance　from　our　base；　he
  was　backed　up　on　his　depots　of　supply；　and　connected　by　interior
  lines　of　railway　with　the　different　armies　of　the　Confederacy；　so
  that　he　could　be　speedily　reinforced。
  Bridgeport　was　to　be　ultimately　a　sub…depot　for　storing　subsistence
  supplies；　and　one　of　the　points　at　which　our　army　would　cross　the
  Tennessee；　so　I　occupied　it　on　July　29　with　two　brigades；　retaining
  one　at　Stevenson；　however；　to　protect　that　railway　junction　from
  raids　by　way　of　Caperton's　ferry。　　By　the　29th　of　August　a
  considerable　quantity　of　supplies　had　been　accumulated；　and　then
  began　a　general　movement　of　our　troops　for　crossing　the　river。　　As
  there　were　not　with　the　army　enough　pontoons　to　complete　the　two
  bridges　required；　I　was　expected　to　build　one　of　them　of　trestles；
  and　a　battalion　of　the　First　Michigan　Engineers　under　Colonel　Innis
  was　sent　me　to　help　construct　the　bridge。　　Early　on　the　3ist　I　sent
  into　the　neighboring　woods　about　fifteen　hundred　men　with　axes　and
  teams；　and　by　nightfall　they　had　delivered　on　the　riverbank　fifteen
  hundred　logs　suitable　for　a　trestle　bridge。　　Flooring　had　been
  shipped　to　me　in　advance　by　rail；　but　the　quantity　was　insufficient；
  and　the　lack　had　to　be　supplied　by　utilizing　planking　and　weather…
  boarding　taken　from　barns　and　houses　in　the　surrounding　country。　　The
  next　day　Innis's　engineers；　with　the　assistance　of　the　detail　that
  had　felled　the　timber；　cut　and　half…notched　the　logs；　and　put　the
  bridge　across；　spanning　the　main　channel；　which　was　swimming　deep；
  with　four　or　five　pontoons　that　had　been　sent　me　for　this　purpose。
  On　the　2d　and　3d　of　September　my　division　crossed　on　the　bridge　in
  safety；　though　we　were　delayed　somewhat　because　of　its　giving　way
  once　where　the　pontoons　joined　the　trestles。　　We　were　followed　by　a
  few　detachments　from　other　commands；　and　by　nearly　all　the
  transportation　of　McCook's　corps。
  After　getting　to　the　south　side　of　the　Tennessee　River　I　was　ordered
  to　Valley　Head；　where　McCook's　corps　was　to　concentrate。　　On　the　4th
  of　September　I　ascended　Sand　Mountain；　but　had　got　only　half　way
  across　the　plateau；　on　top；　when　night　came；　the　march　having　been　a
  most　toilsome　one。　　The　next　day　we　descended　to　the　base；　and
  encamped　near　Trenton。　　On　the　l0th　I　arrived　at　Valley　Head；　and
  climbing　Lookout　Mountain；　encamped　on　the　plateau　at　Indian　Falls。
  The　following　day　I　went　down　into　Broomtown　Valley　to　Alpine。
  The　march　of　McCook's　corps　from　Valley　Head　to　Alpine　was　in
  pursuance　of　orders　directing　it　to　advance　on　Summerville；　the
  possession　of　which　place　would　further　threaten　the　enemy's
  communications；　it　being　assumed　that　Bragg　was　in　full　retreat
  south；　as　he　had　abandoned　Chattanooga　on　the　8th。　　This　assumption
  soon　proved　erroneous；　however；　and　as　we；　while　in　Broomtown　Valley；
  could　not　communicate　directly　with　Thomas's　corps；　the　scattered
  condition　of　the　army　began　to　alarm　us　all；　and　McCook　abandoned　the
  advance　to　Summerville；　ordering　back　to　the　summit　of　Lookout
  Mountain　such　of　the　corps　trains　as　had　got　down　into　Broomtown
  Valley。
  But　before　this　I　had　grown　uneasy　in　regard　to　the　disjointed
  situation　of　our　army；　and；　to　inform　myself　of　what　was　going　on；
  determined　to　send　a　spy　into　the　enemy's　lines。　　In　passing　Valley
  Head　on　the　l0th　my　scout　Card；　who　had　been　on　the　lookout　for　some
  one　capable　to　undertake　the　task；　brought　me　a　Union　man　with　whom
  he　was　acquainted；　who　lived　on　Sand　Mountain；　and　had　been　much
  persecuted　by　guerrillas　on　account　of　his　loyal　sentiments。　　He　knew
  the　country　well；　and　as　his　loyalty　was　vouched　for　I　asked　him　to
  go　into　the　enemy's　camp；　which　I　believed　to　be　near　Lafayette；　and；
  bring　me　such　information　as　he　could　gather。　　He　said　such　a　journey
  would　be　at　the　risk　of　his　life；　and　that　at　best　he　could　not
  expect　to　remain　in　that　section　of　country　if　he　undertook　it；　but
  that　he　would　run　all　the　chances　if　I　would　enable　him　to　emigrate
  to　the　West　at　the　end　c　f　the　〃job；〃　which　I　could　do　by　purchasing
  the　small　〃bunch〃　of　stock　he　owned　on　the　mountain。　　To　this　I
  readily　assented；　and　he　started　on　the　delicate　undertaking。　　He
  penetrated　the　enemy's　lines　with　little　difficulty；　but　while
  prosecuting　his　search　for　information　was　suspected；　and　at　once
  arrested　and　placed　under　guard。　　From　this　critical　situation　he
  escaped；　however；　making　his　way　through　the　enemy's　picket…line　in
  the　darkness　by　crawling　on　his　belly　and　deceiving　the　sentinels　by
  imitating　the　grunts　of　the　half…wild；　sand…colored　hogs　with　which
  the　country　abounded。　　He　succeeded　in　reaching　Rosecrans's
  headquarters　finally；　and　there　gave　the　definite　information　that
  Bragg　intended　to　fight；　and　that　he　expected　to　be　reinforced　by
  Longstreet。
  By　this　time　it　was　clear　that　Bragg　had　abandoned　Chattanooga　with
  the　sole　design　of　striking　us　in　detail　as　we　followed　in　pursuit；
  and　to　prevent　his　achieving　this　purpose　orders　came　at　12　o'clock；
  midnight；　for　McCook　to　draw　in　toward　Chattanooga。　　This　could　be
  done　only　by　recrossing　Lookout　Mountain；　the　enemy's　army　at
  Lafayette　now　interposing　between　us　and　Thomas's　corps。　　The
  retrograde　march　began　at　once。　　I　moved　back　over　the　mountain　on
  the　13th　and　14th　to　Stevens's　Mills；　and　on　the　15th　and　16th
  recrossed　through　Stevens's　Gap；　in　the　Lookout　range；　and　encamped
  at　its　base　in　McLamore's　cove。　　The　march　was　made　with　all　possible
  celerity；　for　the　situation　was　critical　and　demanded　every　exertion。
  The　ascent