"We have to remind you," said the letter, in continuation of paragraphs which had contained simply demands for the money, "that the title-deeds were delivered to you on receipt by us of authority to that effect from the Messrs. Longestaffe, father and son, on the understanding that the purchase-money was to be at once paid to us by you. 
"We have to remind you," said the letter, after demands for the money, "that the title-deeds were delivered to you on our receipt of authority from the Messrs. Longestaffe, on the understanding that the purchase-money was to be at once paid by you. 