Duffy has pleaded not guilty to 31 charges of fraud, breach of trust and bribery related to expenses he claimed as a senator and later repaid with money from the prime minister's then chief of staff, Nigel Wright.
The suspended senator's trial, which began April 7 in the Ontario Court of Justice, is in its 33rd day.
On Friday, Duffy's lawyer, Donald Bayne, suggested that additional details about the purpose of trips included on some of his client's travel claims prove the suspended senator was not trying to defraud the Senate.
Bourgeau had testified that on the claim form, under purpose of travel, senators were only required to write that the trip was for Senate business and that no other details were needed.
During Friday's cross-examination, Bayne referred Bourgeau to three claims that the Crown has alleged should not have been expensed by Duffy because the travel, they say, was not related to parliamentary business.
Bayne pointed out that on each of these claims, more information than was needed was provided for the purpose of the trips.
This marks the last week of the second phase of the trial. When court finishes Friday, the trial will resume on Aug. 11 and go to Aug. 28.
If more time is needed, the trial will break again, before restarting Nov. 18 and running to Dec. 18.