He agreed to marry Mrs.
Jasher, as, if he had not done so, she could have warned Sidney and he could have escaped with both the mummy and the jewels by conniving with Hervey.

The Professor could not risk that, as, remembering Hervey as Gustav Vasa, he was aware how clever and reckless he was.

Whether Braddock ever intended to marry the widow in the end it is hard to say, but he certainly pretended to consent to the engagement, which was mainly brought about by Lucy.

Then came the details of the murder so far as Mrs.Jasher knew.
One evening--in fact on the evening when the crime was committed--the woman was walking in her garden late.

In the moonlight she saw Braddock and Cockatoo go down along the cinderpath to the jetty near the Fort.
Wondering what they were doing, she waited up, and heard and saw them--for it was still moonlight--come back long after midnight.