law: Indian Evidence Act, 1872 
  6. Relevancy of facts forming part of same transaction 
  Facts which, though
  
  not in issue, are so connected with a fact in issue as to form part of the same
  
  transaction, are relevant, whether they occurred at the same time and place or
  
  at different times and places.
  Illustrations
  (a) A is accused of
  
  the murder of B by beating him. Whatever was said or done by A or B or the
  
  by-standers at the beating, or so shortly or after it as to form part of the
  
  transaction, is a relevant fact.
  (b) A is accused of
  
  waging war against the 11[ Government of India] by taking part in an
  
  armed insurrection in which property is destroyed troops are attacked and goals
  
  are broken open. The occurrence of these facts is relevant, as forming part of
  
  the general transaction, though A may not have been present at all of them.
  (c) A sues B for a
  
  libel contained in a letter forming part of a correspondence. Letters between
  
  the parties relating to the subject out of which the libel arose, and forming
  
  part of the correspondence in which it is contained, are relevant facts, though
  
  they do not contain the libel itself.
  (d) The question is,
  
  whether certain goods ordered from B were delivered to A. The goods were
  
  delivered to several intermediate persons successively. Each delivery is a
  
  relevant fact.