最中に => while; during; in the middle of ~ N3
ては[初「はじ」]めて => Only after A did (I) B N3
Time, Situation
〜がさいご(が最後) => if you do... negative result N1
Decisive (resolute decision)
[最中「さいちゅう」] => In the middle of A N3
Time, Situation
たが[最後「さいご」] => Once A occurs, B happens N1
Information, Report
この / その / あの => this / that N5
Spatial relations
ものの => but, although N2
ものの => but, although N2
Things do not match the prediction
その...その => Every... N1
Happens next
...そのもの => Myself... N2
Demonstrate by example
そのものだ => exactly ~ N2
Consider it
~のは…ぐらいのものだ => only (emphasis) N1
Limit