Complex sentence: Oliver Lodge revealed there had been obvious signs of double exposure, the picture of Lady Crookes had been copied from a wedding anniversary photograph, however, Crookes was a convinced spiritualist and claimed it was genuine evidence for spirit photography.
Split into simpler sentences: Oliver Lodge revealed there had been obvious signs of double exposure-the picture of Lady Crookes had been copied from a wedding anniversary photograph. However, Crookes was a convinced spiritualist and claimed it was genuine evidence for spirit photography.