Lucius Quintus Cincinnatus Lamar, Banker Brothers Company v. Pennsylvania…
“ This is one of the common cases in which parties find it to their interest to occupy the position of vendor and vendee for some purposes under a contract containing terms which, for the purpose of restricting sales and securing payment, come near to creating the relation of principal and agent. But, as between Banker Brothers Company and the Pittsburg purchaser, there can be no doubt that it occupied the position of vendor. As such it was bound by its contract to him, and under the duty of paying to the state a tax on the sale. ”
