The session, attended only by Conservative and Lib Dem members, was chaired by deputy presiding officer David Melding, a Tory AM.
Dr Marek also upset Labour by standing against the party's official candidate to become the deputy presiding officer in the assembly.
Welsh assembly deputy presiding officer John Marek, also a former Labour member, said Mr Law also told him he was offered a peerage.
BBC: Trish Law said her MP husband Peter came under pressure
Mr Lennon's lawyer, Paul McBride QC, and former deputy presiding officer of the Scottish Parliament, Trish Godman, were the other two people targeted.
Debate on the bill was briefly suspended after a row broke out in the chamber between the deputy presiding officer and some MSPs.
Two days later, the third package was delivered to the constituency office of the former deputy presiding officer of the Scottish Parliament, Trish Godman.
Deputy Presiding Officer David Melding said he couldn't possibly comment on the standard of debates but promised to pass on Mr Knowles' comments to colleagues.
He upset some within the Labour group by standing against another of his party's AMs for the post of assembly deputy presiding officer, and winning.
The deputy presiding officer assured the audience that the conference would soon be available to view on Senedd TV, one of the few channels you won't see Brucie on.
Rosemary Butler was sacked this week as education secretary, and opposition parties had questioned how someone fresh out of a Labour cabinet could remain politically neutral as deputy presiding officer.
Scottish National Party chief whip Bruce Crawford raised the matter in the Scottish Parliament on Wednesday, asking Deputy Presiding Officer Murray Tosh if the executive was making a statement to Holyrood later this week.
On Wednesday the first new parliamentary session will see MSPs taking the oath and electing the new presiding officer and two deputy presiding officers.
In his pitch for presiding officer, Mr Henry, a former education and deputy justice minister, said he would not stand in the way of an independence referendum, which the SNP is staging in the second half of the parliamentary term.
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