I grabbed my coat, as I remembered, where I heard Mrs Carters name before:
"Holmes, just a moment please."
"Yes?!"
"I've just remembered, where I've already heard the name >Beth Carter<. Not even 2 years ago there was an exhibition at the >National Gallery<. The works of the most talented artists of London were shown." 
"I suppose Mrs Carters drawings were shown, too."
"Yes, and Something very bizarre happened in those days."
"You're talking about the burglaries just a few days after the opening, aren't you? There were three just in the first week, right?!"
"Yes. Then they stopped the whole exhibition."
"Very well. But for now we'll just take a look at the pictures, let's say it's a private exhibition."

Mrs Carter was as astonished as I about Holmes' theory, but she agreed to show us the pictures.
We arrived a little bit later at Threadneedle Street, but we weren't the only ones who were interested in the contents of the safes on this very day.
"What's going on here?"
"A burglary, Watson. But apparent not an usual one. Look who's standing there near the safes."
"Just fancy that! Mr Holmes! You are here?"
"Good Day, Lestrade. It seems like Watson and I are not the only ones who are interested in the contents of the safes."
"Since when you become a burglar, Holmes?", sneered the stocky figure.
Holmes chuckled briefly: "Please don't worry yourself, Inspector. We're just interested in one special box." 
"The burglars not. I wonder, why those rascals opened those small safe-deposit boxes instead of the safe. And anything was taken, that is also funny."
"Can you please tell me a little bit more?"
"OK, if it helps you. It all appeared to happen at lunchtime. Constable Carson was the first one here. Competent young fellow. Been with us for nearly 2 years now. He phoned us, as he discovered that there was a
burglary going on here. As we arrived the rascals had knocked him out to escape. It's a pity that he can't
describe their faces. But back to the burglary. Either those scoundrels were professionals or very dextrous with the picklock."
"Or perhaps they were assisted by a man who had worked here."
"What makes you think that?"
"Inspector Lestrade, may I introduce you to Mrs Beth Carter. She is the wife of the man who had opened the safes. But he's not guilty in that way. He was forced to do it, because his kidnappers are after some pictures which Mrs Carter keeps here at the bank."
"Pictures?!"
"Some drawings Mrs Carter did before going blind. Mrs Carter, what's your safe's number?"
"It's 6154."
"It was also opened. Alas, two drawings are missing."
"Mr Holmes, if there are just thirteen drawings in the safe, please, I've put two pictures in a secret box in the bottom of the safe."
"You're right. Here they are. Mrs Carter, why did you take extra precaution to hide these two drawings?"
"This was also an idea of Jonathan. I told you about his strange ideas."
It was an odd setting: The first picture showed a young couple, that was up to enter >The Theatre Royal<. But the young lady doesn't seem to enjoy it that much and in my opinion she was scared of it. The second picture showed only the man, tall and about 25 years old, walking quite coolly out of the building. Both faces, that of the lady and the man's one, were excellent drawn.
"Now that is interesting. Mr Holmes, do you know who this women is?" 
Lestrade pointed at the young Lady.
"I've already seen that face."
"This is >The corps of Othello<."
"You mean that murder at >The Theatre Royal<?"
"Suicide, Holmes, it was obviously a suicide." Lestrade insisted.
"My dear Lestrade. I know the findings of the investigations, and I don't want to criticise your talents or the talents of your men, but if a young woman wants to kill herself, surely she would throw herself into the River Thames, and not onto a theatre-stage."
"Normally Yes, but this young lady; what was her name; Rodland; it looks as if this Ms Rodland wanted the whole city of London to know of her death, dramatic to the very end......"
"Be serious. I think that could be a hot trail. Mrs Carter, those dates on your drawings, what do they mean?"
"That's in each case the date when I saw the respective scene."
"Very interesting, really......Lestrade, is it possible that one of your men could guard her home?"
"That won't be a problem, Mr Holmes." snorted the Inspector.

After Mrs Carter has left the building, Holmes took a closer look at the drawings.
"Holmes, I still don't see what these drawings have to do with the suicide two years ago."
"My dear Inspector Lestrade; you're disappointing. It's as easy as ABC These are the facts:
We've got two drawings, both of which are wanted by someone, who stops at nothing; neither kidnapping nor murder. The drawings were both done on the same date, on which the murder at >The Theatre Royal< appeared to happen. And one of the pictures shows the victim of this very murder. Pure chance? I don't think so. You'd said, as well as the newspapers, that it was a suicide, not a murder. But let's imagine, that the murderer of Ms Rodland was seen, not during he did it, but together with Ms Rodland, and he found out, who saw him. Now he wants to destroy the evidence."
"Holmes! I think I understand..", I interrupted, "Mrs Carter saw the murderer of Ms Rodland, and she got those drawings, the evidences. Though Mrs Carter never had any idea of that her pictures could be that important, but maybe her husband was threatened by the murderer, so he made her hide the pictures here at the Bank."
"Excellent, Watson. Now let me add Something: I suppose that Mr Carter lied to the murderer about the drawings at first, but the man found out the truth a little time ago. I'm sure you know that there was a burglary right here not even a month ago. The criminals were caught but, they were released just a short time after. My bet is, that those burglars find the drawings by chance, and then, after their release, talked about the strange things some people hide in a safe. The murderer of Ms Rodland heard this very dialogue; unfortunately I have no idea how, where or when. But the man now knew that the drawings, the evidence, still existed. So he decided
to destroy the pictures himself. He kidnapped Mr Carter, who works at the bank as everybody knows, so that his burglary won't look like a burglary. It would had worked, if Mr Carter would had known the safe's number, but, as we know, he hadn't, otherwise we won't see so many safe boxes opened."
Lestrade nodded his approval: "That make sense. And what will be your next step, Mr Holmes?"
"First of all we got to find out who this man is. I think the mother of Ms Rodland will be the best address to turn to. If I'm not totally wrong, she is a widow and lives in Upper Street. Quickly, Watson, we don't have much time."