Jackman said she was pushed.
The next day, Jackman had gone to a doctor and said she had fallen down stairs. She did not mention the confrontation with her husband.
The doctor found she had suffered severe bruising and an x-ray confirmed she had injured her tailbone.
At the time, Clague said the allegations had caused physical and mental health issues such as chest pains, ulcers and sleepless nights.
Speaking to the Herald on Sunday this weekend, Clague said he was sad to be leaving Kristin School after 14 years but was excited about his new role, describing it as an adventure.
Bromsgrove boasts more than 1500 pupils aged 2 to 18. Fees per term range from 4725 ($9400) for a day student to 8990 ($17,700) for a boarder.
In a letter to parents, Kristin School board chairman Philippa Fee said Clague had been "pivotal in establishing a positive and happy culture within the school".