Well it wasn't a punt really. IT was a combination of various factors that made Maclaren take him to Australia in 1901-02.
First and foremost Barnes had a great reputation at Burnley even if the cricket was not of county standards.
Secondly, Lord Hawke refused to release Rhodes and Hirst, the two first choice bowlers for the English touring side giving the excuse that Yorkshire could not spare them since "a tour of Australia would wear out Hirst and Rhodes and Yorkshire cricket would thereby suffer." Lord Hawke had a running feud with Maclaren which continued long after this tour.
Three, Maclaren, who was Lancashire's captain, had decided to play Barnes in
this season ending county match in August 1901 against Leicestershire. On a good wicket, Barnes ran through Leicester's first innings with six for 70. The second innings was almost entirely washed out.
Andrew Searle writes in Barnes's biography . . .
The real circumstances of Barnes inclusion in the touring party followed the county game against Leicestershire. "That man is a fine bowler. I am going to ask him to join my team in Australia." Maclaren is reported to have told some of his senior players after Barnes's six wicket haul.
When the experienced Lancashire batsman Albert Ward asked Barnes, "Has Maclaren said anything about going to Australia?" Barnes was flabbergasted, clearly believing it was a typical piece of dressing room humour. Moreover, after recieving a telegram inviting him to tour during a Lancashire league game a few weekes later Barnes though it was a continuation of the ruse. It was only when Joe Allen, his Burnley captain ordered him off the field to accept the offer that Barnes knew it was no joke.
On the boat to Australia Barnes asked Maclaren why he had been selected, pointing ut that he hadn't even seen a Test match - let alone thought of playing in one - and that he wasn't a fast bowler. Maclaren shrewdly replied,"You are fast enough for what I want, Barnes."
Evidentaly this was a new experience for Maclaren, having a player claim that maybe he wasn't good enough, or the right type of player for the team. " I think we will get on well together," he said. "I would rather have a man say what he thinks than have a 'yes' man and then go away and grouse with the others."
Barnes then gave Maclaren a taste of what the cricket administrators of England were to experience time and again for the next twenty years. "I shall NEVER do that. If I do not agree with you I shall always say so,"
Although Maclaren has been repeatedly described as pig headed, and his tactics often seemed dubious, his decision to take Barnes to Australia was due to sound common sense. . . With the enforced unavailability of Hirst and Rhodes, Maclaren had a hunch that Barnes would be ideally suited to Australian conditions after seeing him perform against Leicestershire. It was one of the most inspired hunches of all time.