Walls ... they're going up

Quick post, as I'm still trying to catch up from the vacation trip last week. The mason's have been working the last 7 days to get the walls up. I'd say they are about 60% complete. They are missing the back wall in the playroom and need to complete the office.

We are using 4" block, so it matches the original house. They are "striking" (the concrete between each block) in the same pattern as the original house.

Should be finished this week. It is going slower than they expected, mainly due to weather. The last week was near 100F and no breeze. Truly brutal to work outside.