Your first waypoint is at N 49.15.670 W 123.06.838. There is a statue there with a plaque. This is a good place to start - after all, he started Vancouver. More or less.
What year did he arrive? Subtract 1099. The remaining digits go here: 49 15.xxx
What was the date (the days) this monument was erected? Subtract 3, and put those digits here : 123.06.4xx
That leads you on a short walk (or very quick drive) along tree lined streets - ending at a small "vest pocket park" where you'd least expect to find one.
There is a plaque dedicated to the person the park was named after. When did this person arrive in Vancouver? Add the first two digits - that's the first number (A). How many times does the numeral "8" show up in that year? - that's the second number (B). For the the third number of the co-ordinates (C), take the 3rd number of the year and subtract 3. (49 15.ABC)
How long (in years) did he preserve things? Put that number here: 123 07.7xx
Those are your co-ordinates to the cache location.
This is a long walk (or a short drive) away to another small "vest pocket park" with amazing views of Vancouver. There is no bushwhacking involved, DO NOT LEAVE THE PATH. This final site is not wheelchair accessible due to stairs - sorry.
Be advised that GPS readings can be erratic in this area. Trust the hint more than your GPS readings.