Rather an unusual physiognomy; certainly, not indicative of vulgarity or degradation.
Chapter 29 · St John Rivers
Context
St. John Rivers speaks this assessment of Jane's face after examining her while she lies semi-conscious in bed, responding to Diana's hope that they can help her.
Analysis
St. John's clinical diction—'physiognomy,' 'indicative,' 'vulgarity'—reads Jane's face as if diagnosing a specimen, not comforting a person. His choice to assert what her features are *not* ('not indicative of vulgarity') reveals that he did consider the possibility, suggesting his charity comes with scrutiny. This introduces St. John as someone who categorizes people by visible markers of class and moral worth.
Essay Tip
Use this to argue that St. John practices a judgmental form of charity—he helps Jane only after her face passes his test for respectability, revealing that his Christian mercy has class-based limits.