In proving the sale or consumption of intoxicating liquor for the purpose of any proceeding relative to any offence under this Act, it shall not be necessary to show that any money actually passed or any intoxicating liquor was actually consumed, if the court hearing the case be satisfied that a transaction in the nature of a sale actually took place, or that any consumption of intoxicating liquor was about to take place; and proof of consumption or intended consumption of intoxicating liquor on premises to which a license under this Act is attached, by some person other than the occupier of or a servant in such premises, shall be evidence that such liquor was sold to the person consuming, or being about to consume, or carrying away the same by or on behalf of the holder of such license.