He only played one other international that year—a Calcutta Cup match against England national rugby union team.

As captain, he took Scotland to their first ever Five Nations Grand Slam—that is, wins over England, Wales, Ireland and France in one season.

After trailing England 11–5, Scotland scored a try that involved several players, including Macpherson to reduce the deficit to 11–10.

[3] Macpherson missed the 1926 Five Nations Championship while studying for a year at Yale in the US,[5] but returned in 1927 and continued to play for Scotland until the conclusion of the 1931/32 season.

[7] In the 1976 New Year Honours, Macpherson was appointed a Commander of the Order of the British Empire (CBE) "for services to Greenwich Hospital.

The selection was made via a poll conducted by Scottish Rugby Magazine and The Herald.