Question:
Which position did Lord Douglas Gordon-Hallyburton hold in Jun, 1837?

Context:
 Lord Douglas Gordon-Hallyburton holds the position of Member of the 13th Parliament of the United Kingdom from Jul, 1837 to Jun, 1841. 
 Lord Douglas Gordon-Hallyburton holds the position of Member of the 12th Parliament of the United Kingdom from Jan, 1835 to Jul, 1837. 
 Lord Douglas Gordon-Hallyburton holds the position of Member of the 11th Parliament of the United Kingdom from Dec, 1832 to Dec, 1834. 
 Lord Douglas Gordon-Hallyburton holds the position of Member of the 10th Parliament of the United Kingdom from Jan, 1832 to Dec, 1832.

Answer:
Member of the 12th Parliament of the United Kingdom