Bonass signed for
Chesterfield, newly promoted to the
Second Division, for a £250 fee in May 1936. scored the opening goal in the first home match of the new season, against
Norwich City, and the
Derby Evening Telegraphs correspondent was impressed: "Bonass, at outside-left, was the pick of the line, for he generally shot accurately, and he showed a good idea of combination." At Christmas he scored the only goal of the game against
Aston Villa, and contributed twoone a neat back-heelto a 4–0 win against
Swansea Town on New Year's Day. His goal return for the season was 14 from 39 league games as Chesterfield finished in mid-table, Chesterfield listed fourteen forwards on their retained list, but Bonass kept his place in the team, partnered at inside-left by new signing
Peter Ramage who, the
Derby Evening Telegraph wrote, "brought out the best in Bonass and
Clifton". He was injured against
Nottingham Forest in December, thus ending a sequence of 19 consecutive appearances. He had returned to fitness by mid-January, when his team's FA Cup third-round victory reportedly "owed much to ... the dash of Bonass and Clifton in the forwards". They progressed to the fifth round, in which they lost to
Tottenham Hotspur only after a replay in front of a 50,000 crowd at
White Hart Lane. and after contributing six goals from 39 appearances in the league, Bonass was left out of the last few games, appearing instead for the reserves in the
Central League. He was again retained for 1938–39. Bonass came into the team at outside-right for the fifth game of the new season, which coincided with Chesterfield's first win. Two weeks later, he scored the only goal of the game at home to
West Ham United direct from a
corner kick. He kept his place to the end of the year, but then played only three times before the end of February when he submitted a transfer request. The
Derbyshire Times reported no disharmony between club and player, who just felt that different surroundings might help a return to form. He moved on to London club
Queens Park Rangers (QPR) in June, and played in all three of their matches before the
1939–40 Football League season was abandoned when war broke out. ==Style of play==