Complex sentence: There is little doubt the Lonsdale born in Cobalt in 1924 was not the Lonsdale arrested in London in 1961: the former had been circumcised, the latter was not.
Split into simpler sentences: There is little doubt the Lonsdale born in Cobalt in 1924 was not the Lonsdale arrested in London in 1961. The former had been circumcised, the latter was not.