Hereupon he withdrew from his other positions and from public life .
In 1886 , Verhulst was appointed an honorary member of Diligentia on the occasion of his seventieth birthday , but the membership was revoked after less than three months .
Hereupon Verhulst withdrew from Verhulst 's other positions and from public life .
In 1886 , Verhulst was appointed an honorary member of Diligentia on the occasion of his seventieth birthday , but the membership was revoked after less than three months .