One piece of work simply leads to another.

Here I thought I had earned at least a good month's rest, but, instead of that, a further demand is made upon me.

I am like the genii in fairy tales: no sooner is one apparently impossible task accomplished than another is set." "But what a magnificent thing it would be if you could discover the robber or robbers." "Magnificent enough, yes; but that isn't to be done by inviting a lot of old women to tea, is it ?" "True, so we shall have to set our wits together in another direction.
I tell you, Jennie, I know I have influence enough to have you made a member of the special police.

Shall I introduce you as from America, and say that you have made a speciality of solving mysteries?
An appointment to the special police would allow you to have unrestricted entrance to the secret portion of the Treasury building.

You would see the rooms damaged by the explosion, and you would learn what the police have discovered.