"The Adventure of the Lion's Mane"

The Adventure of the Lion's Mane.
The case begins Tuesday, July 30, 1907.
Why?

STATEMENT OF THE MONTH AND YEAR:
"Towards the end of July, 1907, there was a severe gale, the wind blowing up-channel, heaping the seas to the base of the cliffs and leaving a lagoon at the turn of the tide. On the morning of which I speak the wind had abated, and all Nature was newly washed and fresh."

THE DAY OF THE WEEK:
"Tuesday was to-day, and I had meant to meet him to-night." 

WHAT THE BARING-GOULD ANNOTATED SAYS:
July 27, 1909. 

WHAT ZEISLER, THE KING OF CHRONOLOGY, SAYS:
July 27, 1909.

THE BIRLSTONE RAILWAY TIMETABLE:
In dating previous cases, I’ve always followed the motto, "Trust Watson." One can hardly do less with Holmes, as the detective himself would have to be an even more precise observer — and this case is all Holmes. If Sherlock Holmes says there was a gale in late July of 1907, then we can surely assume there was a gale in late July of 1907, even if standard weather historians have missed it. Thus, we can place this case on Tuesday, July 30, 1907, and let disbelievers like Baring-Gould and Zeisler think what they like.