In 1867 he and Bennett had a third share (with J. M. Wendt and John Temple Sagar) in building Adelaide's Theatre Royal in Hindley Street, which he managed.
In July 1876 Lazar made a rare acting appearance as Chrysos in W. S. Gilbert's comedy Pygmalion and Galatea starring Eleanor Carey, and was well received.
After some months of exhibiting aberrant behaviour, Lazar was in February 1882 admitted to Dr. Arthur J. Vause's (previously Dr. G. A. Tucker's) private lunatic asylum at Cooks River.
[10] Lazar was a keen follower of horse racing, and was an excellent billiards player, not being disgraced in a match against John Roberts, jun.
He wrote the libretto for a musical The Beast, a bound copy of which, undated and unpublished, is held by the Mitchell Library in Sydney.