This happened on the afternoon of that very day.

It was towards evening when I returned.

The moment I rung the bell at my own door, I heard his pattering feet and gleeful voice in the entry.
"Where's my wagon ?" said he, as I entered, a shade of disappointment falling suddenly upon his excited, happy face.
"What wagon, dear ?" I asked.
"My wagon.

The wagon you promised to buy me." "I didn't promise to buy a wagon, my son." "Oh, yes you did, mother! You promised me this morning." Tears were already in his eye, and his face wore a look of distressing disappointment.
"I promised to buy you a wagon?
I am sure I remember nothing about it," I replied confidently.

"What in the world put that into your head ?" "Didn't I ask you ?" said the child, the tears now overflowing his cheeks.
"Yes, I believe you did ask me something about a wagon; but I didn't promise to buy you one." "Oh, yes you did, mother.