A Bunch of Cherries by L.T. Meade

Amongst the many duties which fell to the care of Bertha Keys was the one of looking after the postbag. Every afternoon she took the girls' letters and put them in that receptacle, hanging the key on a little hook in the hall. Morning after morning it was she who received the postbag, unlocked it, and brought the contents to Mrs. Clavering, who always distributed the letters herself. Thus it was easy for Bertha to abstract the letters which contained the Dawlish postmark. She did this for a reason. It would never do for Florence to find out that her mother had not received the letter with the postoffice order.

Bertha knew well that if enquiries were made it could be quickly proved that she had never obtained a postoffice order at all, and thus her own ruin would be the result of her theft. She had taken the two sovereigns in a momentary and strong impulse, and had since to a certain extent regretted her foolhardy and wicked deed. Not that she regretted it because she had stolen the money, but because she feared the consequences. She now, therefore, had a double object for putting Florence Aylmer into her power. If she could do that, if by means of some underhand action on her part she could win the Scholarship for Florence, Florence would help her in the future, and even if Bertha's theft was known to her, would never dare to betray her. It is well known that it is the first step which costs, and Bertha's first theft was followed by the purloining of several letters from poor Mrs. Aylmer to her daughter.