Let me begin with four important facts: first, our earnings per share was up 20%, which I'm sure you appreciate, is no small feat in this pandemic environment; second, we shipped an all-time record 2.2 million tons of cement during the quarter; third, we shipped the second quarter record 720 million square feet of Wallboard; and fourth, and most importantly, we achieved these results safely.
Cement volumes were up 23% for the quarter and up 28% for the fiscal year, reflecting the overall strength across all of our organic markets.
Now let me turn to Wallboard.
Our Wallboard shipments were up 6% this quarter and were up 6% for the fiscal year, a consistent trend.
Latest industry data showed industry shipments, up 1% for the quarter.
Finally, let me comment on the status of the planned separation of these two businesses, Cement and Wallboard.
Because of this uncertainty, we have not determined the timing for the split.
Second quarter revenue was a record $448 million, an increase of 12% from prior year.
This increase primarily reflects contribution from the Kosmos Cement Business, we acquired in March, and organic revenue improved 2%, reflecting increased Cement and Wallboard sales volume.
Second quarter earnings per share from continuing operations were $2.16, an improvement of 20%.
Revenue in this sector increased 15%, driven primarily by the addition of the recently acquired Kosmos Cement business.
Organic cement sales volume and prices improved 1% and 4%, respectively.
Operating earnings also increased 15%, again, reflecting the addition of the Kosmos Cement Business.
As we discussed last quarter, because of COVID-19, we delayed certain planned cement plant maintenance outages until our second quarter, which resulted in approximately $5 million of higher maintenance costs this quarter compared with the prior year period.
Second quarter revenue in our Wallboard and Paper business was up 1%, as improved sales volume was partially offset by lower Wallboard prices.
Quarterly operating earnings in this sector declined 1% to $48 million, again reflecting lower Wallboard sales prices, partially offset by increased volume.
During the first six months of the year, operating cash flow increased 94%, reflecting earnings growth, disciplined working capital management and the receipt of the majority of our IRS refund.
Capital spending declined to $41 million, and we continue to expect capital spending in the range of $60 million to $70 million for fiscal 2021.
At September 30, 2020, our net debt-to-cap ratio was 48% and our net debt-to-EBITDA leverage ratio was two times.
Total liquidity at the end of the quarter was over $700 million, and we have no near-term debt maturities.

Summary:
Now let me turn to Wallboard.
Finally, let me comment on the status of the planned separation of these two businesses, Cement and Wallboard.
Because of this uncertainty, we have not determined the timing for the split.
Second quarter revenue was a record $448 million, an increase of 12% from prior year.
Second quarter earnings per share from continuing operations were $2.16, an improvement of 20%.