Who were Dr. Heidegger's four friends?

Dr Heidegger's 'venerable' friends were Mrs Wycherly, Colonel Killigrew, Mr Gascoigne, and Mr Medbourne.

Mr Medbourne was once a prosperous merchant who lost everything through wild speculation and now lives more or less as a beggar.

Colonel Killigrew spent his best years in pursuit of various pleasures of the flesh that ravaged both his soul and his body. He now suffers from gout and unspecified spiritual ailments.

Mr Gascoigne had been man of somewhat ill repute and was once a famous politician who was subsequently disgraced. Even worse, he is now forgotten by the present generation.

Mrs Wycherly was, in her time, a very beautiful woman (and courted by each of the men mentioned above). However, at present she lives in seclusion because of scandalous rumors concerning her.