A gracious observation.
As much as to say, "Mr.Tulkinghorn, we remember your existence when you are not here to remind us of it by your presence.

We bestow a fragment of our minds upon you, sir, you see!" Mr.Tulkinghorn, comprehending it, inclines his head and says he is much obliged.
"I should have come down sooner," he explains, "but that I have been much engaged with those matters in the several suits between yourself and Boythorn." "A man of a very ill-regulated mind," observes Sir Leicester with severity.

"An extremely dangerous person in any community.

A man of a very low character of mind." "He is obstinate," says Mr.Tulkinghorn.
"It is natural to such a man to be so," says Sir Leicester, looking most profoundly obstinate himself.

"I am not at all surprised to hear it." "The only question is," pursues the lawyer, "whether you will give up anything." "No, sir," replies Sir Leicester.