"I am practically in the employ of Mr. Nobel. I have to meet everyone he sends my way"

Naguib Mahfouz's quote recommends that he remains in a position of yoke to Mr. Nobel. He is obliged to meet with anyone that Mr. Nobel sends his method, indicating that he is under the control of Mr. Nobel. This could mean that Mr. Nobel is his employer, or that he is in some way beholden to him. It might likewise recommend that Mr. Nobel has some kind of influence over Mahfouz, and that he is expected to comply with his demands. The quote suggests that Mahfouz remains in a secondary position to Mr. Nobel, which he is anticipated to do whatever he is asked. This could be an indication of respect for Mr. Nobel, or it might be a sign of worry. In any case, it is clear that Mahfouz is in a position of servitude to Mr. Nobel, and that he is expected to meet anybody that Mr. Nobel sends his method.