Answer:
when jerome packs the bag he packs everything and after the packing is done he forgets whether he has packed his toothbrush. this has caused him a lot of trouble as he had to unpack the whole bag and again pack it all just to check whether he had packed his toothbrush.in the story after packing the bag he had to open it for putting in the boots and after that he was not sure whether he had packed his tooth brush so he emptied the whole bag and went through it to search for his toothbrush.at last he found his toothbrush inside his boots .this caused a lot of mess and he had to pack the bag again.
hope this helps