Is the comma after preach needed?

[Guest guest]

>"...when sending him out to preach, Srila Bhaktisiddhänta Sarasvaté

>instructed him to prove the falsity of that theory."

>

>Without the comma, it reads "to preach Srila Bhaktisiddhänta

>Sarasvaté" as if the subject of his preaching was Srila

>Bhaktisiddhänta Sarasvaté. But if we were to speak that sentence we

>would not naturally pause after "preach." Insertion of the comma thus

>seems undesirable. Since "preach SBS" makes no sense, is dropping the

>comma acceptable?

 

I'd keep it.