Portraits of Bishops

Can any of your correspondents inform me of portraits of John Williams, archbishop of York (previously bishop of Lincoln); John Owen, bishop of St. Asaph; George Griffith, bishop of St. Asaph; Lewis Bayley, bishop of Bangor; Humphrey Henchman, bishop of London (previously bishop of Salisbury); Lord Chief Justice Glynne; and Sir Thomas Milward, chief justice of Chester. Cassan, in his *Bishops of Salisbury*, mentions one of Henchman; but I mean exclusively of this.